Database Users

Nexus 10 looses battery life when charging

Hey this is a great tablet, but I noticed a bug and was curious if anyone else had this issue? When my screen is on max brightness and charging I noticed the battery will slowly lose charge. This becomes the most obvious if watching netflix or gaming. I hope someone can point me in the right direction of fixing this, unless of course it is a physical limitation of the device.
Edit: I have this problem when charging to a wall outlet, and when connected by usb. I am using the stock samsung charger. I understand the limitations of usb charging through a computer I am more suprised by the AC adapter connected to a home outlet not supplying enough current.
Sent from my Nexus 10 using Tapatalk 2

I have had this problem but only with brightness up and charging via computer.
Sent from my Nexus 10 using xda premium

Search the web I believe I read that this unfortunately is a problem with the device. Maybe it was attack of the show. I know I heard/read it somewhere.
Sent from my NookTablet using xda app-developers app

The Nexus 10 charges pretty slowly, so if it's using more power than it's getting, it's going to go down (though slower than if you weren't plugged in). Computers generally can't supply that much current, and most USB chargers are 1A. The stock charger is 2A, so use that when possible for faster charging.

rp181 said:
The Nexus 10 charges pretty slowly, so if it's using more power than it's getting, it's going to go down (though slower than if you weren't plugged in). Computers generally can't supply that much current, and most USB chargers are 1A. The stock charger is 2A, so use that when possible for faster charging.
Click to expand...
Click to collapse
The thing that you plug into a AC outlet is a power supply not a charger. The charger is in the N10. I've measured it with a current clamp meter and the N10 isn't even asking for half of the 2A that the power supply can deliver.

wptski said:
The thing that you plug into a AC outlet is a power supply not a charger. The charger is in the N10. I've measured it with a current clamp meter and the N10 isn't even asking for half of the 2A that the power supply can deliver.
Click to expand...
Click to collapse
Clamp meters generally aren't that accurate for such low amperage (obviously depends on the meter). In any case, the 2A supply can give enough for the battery to charge and for the device to be used concurrently. It may draw an amp just for charging, but that leaves another amp for the device to be used while maintaining peak charging speed.
This is all speculative, as I'm not 100% that the charging and device power usage is parallel.

Here's an easier way to determine N10 charging power that anyone can do. Get a Kill-A-Watt for $18 from Walmart, and plug the AC adapter into that. This doesn't directly tell you how much current the N10 pulls, but does allow you to infer charging current from the wattage pulled from the wall. You can then compare it with iPad 4 charging graph (in wattage) to determine N10 charging power as a percentage of iPad.
Below we see iPad 4 pulling a constant 13.6W for ~4hr before tapering off. iPad 4 uses the new 12W (2.4A) charger w/ Lightning connector. Assuming 80% conversion efficiency, it's about 10W (2A) going to iPad. iPad 4 averages 5-6hr for a full charge.
http://www.anandtech.com/show/6472/ipad-4-late-2012-review/7
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iPad 4: Battery size = 42.5Whr, charge current = 2A, charge time = 6hr. N10 has 33.3Whr battery, and also averages 6hr. Assuming similar charging power curve, N10 would need to pull 2A * (33.3/42.5) = ~1.6A to achieve same charging time. So a measurement of less than 1A charging current is likely inaccurate, unless measurement was taken at the (tapered) tail end of the charging process.
Note 1: Per Anandtech, iPad also suffers from net-loss charging under heavy use, so the slow-charging issue stems from USB charging's limitation for high-capacity devices.
Note 2: Charging power may also be limited for thermal reasons. N10 already have a thermal throttling problem as it is, and faster charging would make this worse.

rp181 said:
Clamp meters generally aren't that accurate for such low amperage (obviously depends on the meter). In any case, the 2A supply can give enough for the battery to charge and for the device to be used concurrently. It may draw an amp just for charging, but that leaves another amp for the device to be used while maintaining peak charging speed.
This is all speculative, as I'm not 100% that the charging and device power usage is parallel.
Click to expand...
Click to collapse
It's high quality amp meter using its 4000mA range. It's draw less than 1A total, so if the battery is at 80%, it's not charging it as fast as it can. It runs off the battery and the charger replaces the usage. If demand is high, more comes out of the battery than the charger is putting in, not because it can't get it from the PS either.
It could charge twice as fast but the N10's internal charger is slow.

Arg consensus says it's related to an internal charger limitation, no hope of a software fix? Well thanks for the responses.
Sent from my Nexus 10 using Tapatalk 2

e.mote said:
Here's an easier way to determine N10 charging power that anyone can do. Get a Kill-A-Watt for $18 from Walmart, and plug the AC adapter into that. This doesn't directly tell you how much current the N10 pulls, but does allow you to infer charging current from the wattage pulled from the wall. You can then compare it with iPad 4 charging graph (in wattage) to determine N10 charging power as a percentage of iPad.
Below we see iPad 4 pulling a constant 13.6W for ~4hr before tapering off. iPad 4 uses the new 12W (2.4A) charger w/ Lightning connector. Assuming 80% conversion efficiency, it's about 10W (2A) going to iPad. iPad 4 averages 5-6hr for a full charge.
http://www.anandtech.com/show/6472/ipad-4-late-2012-review/7
iPad 4: Battery size = 42.5Whr, charge current = 2A, charge time = 6hr. N10 has 33.3Whr battery, and also averages 6hr. Assuming similar charging power curve, N10 would need to pull 2A * (33.3/42.5) = ~1.6A to achieve same charging time. So a measurement of less than 1A charging current is likely inaccurate, unless measurement was taken at the (tapered) tail end of the charging process.
Note 1: Per Anandtech, iPad also suffers from net-loss charging under heavy use, so the slow-charging issue stems from USB charging's limitation for high-capacity devices.
Note 2: Charging power may also be limited for thermal reasons. N10 already have a thermal throttling problem as it is, and faster charging would make this worse.
Click to expand...
Click to collapse
The AC current drawn by the charger doesn't infer the DC current. I have "AA" charger that charges at 7.5A(not a typo) and it doesn't draw 7.5A AC. I have a car battery charges at 2, 4, 10, 40A and car start at 100A and of course, a normal wall socket is limited to 20A max.
I'll have to check that again at a lower battery level to make it wasn't in the constant voltage part of the charging process.

I measured over 1800mA current draw with the screen on full and 2400mA with full brightness playing asphalt 7
I measured my tablet going from empty to full in 5.5 hours which makes current from the PSU around 1600mA
Looks to be that USB2 can't keep up with the power this tablet can consume when working flat out. Maybe they should have gone with USB3 as that can supply up to 5A

>The AC current drawn by the charger doesn't infer the DC current.
AC current isn't considered; I'm looking only at the wattage and assuming 80% conversion efficiency. We know that USB = 5V, so from there we can infer DC amperage. It doesn't make sense to use a 2+A adapter at less than 50% of its rated output, especially when the charging time is already a long ~6hr. Using iPad as a baseline provides another point of reference, which says that 6hr charging time is probably considered "normal" for this high-capacity category.
>Maybe they should have gone with USB3 as that can supply up to 5A
As said, higher thermal would be a problem for faster charging. The underlying issue is N10's high-res screen, which only the Exy 5 can drive at the time of design, and why the latter was selected (Duarte dude said as much in N10 promo clip). The screen+SoC combo requires more power than can be compensated for, in both its thermal envelope and its charging capacity.
Found the promo clip. Listen at the 9:46 mark, or click on the link:
http://www.youtube.com/watch?v=66-4uMQqerA&t=586

e.mote said:
>The AC current drawn by the charger doesn't infer the DC current.
AC current isn't considered; I'm looking only at the wattage and assuming 80% conversion efficiency. We know that USB = 5V, so from there we can infer DC amperage. It doesn't make sense to use a 2+A adapter at less than 50% of its rated output, especially when the charging time is already a long ~6hr. Using iPad as a baseline provides another point of reference, which says that 6hr charging time is probably considered "normal" for this high-capacity category.
>Maybe they should have gone with USB3 as that can supply up to 5A
As said, higher thermal would be a problem for faster charging. The underlying issue is N10's high-res screen, which only the Exy 5 can drive at the time of design, and why the latter was selected (Duarte dude said as much in N10 promo clip). The screen+SoC combo requires more power than can be compensated for, in both its thermal envelope and its charging capacity.
Found the promo clip. Listen at the 9:46 mark, or click on the link:
http://www.youtube.com/watch?v=66-4uMQqerA&t=586
Click to expand...
Click to collapse
Watts=volts x current. 2A or 2.1A USB power supplies are a common size. Using a overrated PS isn't uncommon.

skally said:
I measured over 1800mA current draw with the screen on full and 2400mA with full brightness playing asphalt 7
I measured my tablet going from empty to full in 5.5 hours which makes current from the PSU around 1600mA
Looks to be that USB2 can't keep up with the power this tablet can consume when working flat out. Maybe they should have gone with USB3 as that can supply up to 5A
Click to expand...
Click to collapse
How did you measuring the current?

I think some of the chargers are defective.
I bought a 3rd party usb power brick and it charges in about 5 hours.
The one that came with it took overnight.

OK what others are saying is that the issue is from the limitations of USB in general unable to exceed 1.8 amps. I guess we have to wait until a decent pogo charger comes out which is rumored to have 2amps. There are 3rd party ones being sold for around 24 bucks on ebay.
Sent from my Nexus 10 using Tapatalk 2

wptski said:
How did you measuring the current?
Click to expand...
Click to collapse
I calculated these numbers from usage data.
battery capacity / hours of use
screen on full brightness
9Ah / 5 hours = 1.8A
Playing Asphalt
9Ah / 3h 40 min = 2.4A
These numbers actually close to double with the screen on around 20% brightness
---------- Post added at 11:39 AM ---------- Previous post was at 10:43 AM ----------
e.mote said:
As said, higher thermal would be a problem for faster charging.
Click to expand...
Click to collapse
There are alternatives. Microsoft managed just fine with a 24w Charger. I suspect it runs at 12V 2A, but can't find any specs
http://www.anandtech.com/show/6385/microsoft-surface-review/9
ASUS also do something similar, using 15 Volts to lower the current and reduce energy lost in heat.

skally said:
I calculated these numbers from usage data.
battery capacity / hours of use
screen on full brightness
9Ah / 5 hours = 1.8A
Playing Asphalt
9Ah / 3h 40 min = 2.4A
These numbers actually close to double with the screen on around 20% brightness.
Click to expand...
Click to collapse
How can you get 2.4A from a 2.0Ah PS?
I retested making sure my battery was low enough, at 80% with it OFF, I got around 800ma. It isn't my meter but there is one posible flaw in my setup though. I'm using a USB extension cord and it may be causing a voltage drop because of the added lenght and skewing the reading.

The voltage drop should be negligible for a USB cable, and any minor deviations should be corrected via regulator in the Nexus 10.

rp181 said:
The voltage drop should be negligible for a USB cable, and any minor deviations should be corrected via regulator in the Nexus 10.
Click to expand...
Click to collapse
Then my max 800ma charging rate is correct and skally's calculations are incorrect??

How cable length and chargers affect charge rate

I recently purchased a handful of Monoprice micro USB cables in 3 different lengths. I thought it would be interesting to test the different cables with two different chargers and share the results.
Test Equipment:
Load: Samsung Galaxy Note 2, Custom 4.3 ROM (Carbon), battery @60%
Measuring tool: Charge Doctor (USB voltage and amp meter)
Stuff to test:
Cables: 12", 36" and 72" Monoprice micro USB cables
Charger 1: Samsung 2.0A USB charger (Stock Note 2)
Charger 2: Asus 1.35A USB Charger (Stock Nexus 7, 2013)
Assumption:
Each of the Monoprice USB cables are made with the same gage wire, visually they look the same.
Method:
Phone turned on, camera app loaded, attached the test USB cable photographed the results on the amp meter. I tested each of the 3 cables the same way and repeated the tests with the 2nd charger. Did it all within 10 minutes so that the amount of charge on the phone didn't change significantly.
Results: (See attachments)
Analysis:
- The Asus charger, even though it is capable of putting out 1.35A and even though the phone is capable of accepting at least 1.0A (demonstrated with the Samsung charger), it could only deliver .73A
- The Asus charger seemed to max out at .73A as the 12" and 36" cables had the same results
- The graph indicates the Samsung charger may be able to do better with an even shorter cable
Conclusions:
1) The shorter the cable the faster the charge, but there's a limit
2) The higher amps the charger is capable of, the faster the charge, there must be a limit but I only had 2 chargers to test
3) Duh!

Awesome data. As expected, there is a difference between the current rating on the charger, max current draw on the phone, and actual use, but I didn't expect it to be so much.
I'm curious how much my charger setup gets and concerned that if I did get up above 1A I might overheat my phone. Next test is battery temperature after a few minutes of charging at various currents.
lbloo said:
Analysis:
- The Asus charger, even though it is capable of putting out 1.35A and even though the phone is capable of accepting at least 1.0A (demonstrated with the Samsung charger), it could only deliver .73A
- The Asus charger seemed to max out at .73A as the 12" and 36" cables had the same results
- The graph indicates the Samsung charger may be able to do better with an even shorter cable
Click to expand...
Click to collapse

Scrawson said:
Awesome data. As expected, there is a difference between the current rating on the charger, max current draw on the phone, and actual use, but I didn't expect it to be so much.
I'm curious how much my charger setup gets and concerned that if I did get up above 1A I might overheat my phone. Next test is battery temperature after a few minutes of charging at various currents.
Click to expand...
Click to collapse
Good idea, I even have an IR instant read thermometer, but it'll take more time to test. To give the battery time to heat up I'd assume I'd have to wait at least 5 minutes, then I'd have to let it rest to get back to room temperature, that might take even longer. If I get ambitious I'll do it.

very interesting test....

Easy answer.
It does not.
(unless you have a cable so long, the voltage drop over the cable brings the voltage below 4.75V)

buster_friendly said:
Easy answer.
It does not.
(unless you have a cable so long, the voltage drop over the cable brings the voltage below 4.75V)
Click to expand...
Click to collapse
The tests I did certainly seem to indicate cable length does affect charge rate.

The wire gauge plays a part. Larger and longer should be about the same as smaller and shorter.
But at 5 volt and low amps. It would be hard to measure.
IMHO.
Sent from my XT897 using XDA Premium 4 mobile app

Scrawson said:
Awesome data. As expected, there is a difference between the current rating on the charger, max current draw on the phone, and actual use, but I didn't expect it to be so much.
I'm curious how much my charger setup gets and concerned that if I did get up above 1A I might overheat my phone. Next test is battery temperature after a few minutes of charging at various currents.
Click to expand...
Click to collapse
The source, wiring and connections may limit the current, but so will the phone: don't worry about using a cable shorter than the average mosquito
With most devices you can actually choose between some preset limits (or freely input one) through sysfs...

Basically if u charge with usb cable......it will take more times....

So what amperage do I need to charge a N7 with a 50 foot cable with 4 22 gauge conductors??

hi there. although this thread is old. id like to share my experience on this matter. So i bought a fast charger brand samsung S6. it comes with its own cable. so one day the cable broke so i modified it to be longer. Im using a zenfone 6. the samsung charger blok support up to 2.1A. So the cable now is 5 feet. before i charge my phone from 0% to 100% takes 2.5 hours to fill up. now after enhancing the cable length my phone took 6 hour to fill up from 0% to 100%.
Then i bought a Hp cable that is just around 7cm in length charged my phone and supprisingly it only took 2 hrs to charge my phone from 0% to 100%.. Length does matter LOL!!!
Just sharing, i know its not even a high tech stuff. Am just reviving an old thread thats all.. cheers.

Yes because the flow of current
sent from IT Heaven
---------- Post added at 07:15 PM ---------- Previous post was at 07:15 PM ----------
Becaues the flow of current
sent from IT Heaven

Z3 Battery Charging Thread

Hiya,
I'm copying my original post over from the Z3 Compact forum as there should be a fair amount of similarities between the two models regarding battery charging.
Hiya,
I' hoping this is the right section to post this in.
I don't have my Z3C yet, but I've been searching for information on charging speed, charging current etc. - and there is barely anything to be found. What seems to be consent: A full charge (0-100%) takes about three hours. But then, some people say an almost full charge (0-90%) takes much less, as charging current is greatly reduced for the last 10% to reduce stress on the battery. Sony itself also claims that a small charge (something like 0-10%) should be quite fast as well.
Then there's some speculation about QuickCharge 2.0 being used or not used, that you could use a Motorola 2.0A charger to charge it faster than with the provided 1.5A Sony charger etc., which also brings up the question which resistor values on the D+ and D- wires are necessary to toggle different charging currents. (Or I might be stupid and there's a standard for that by now, which is the same for all Qualcomm devices.)
To cut it short: I'd request those who have a Z3C to post some comments about their charging times, and at best even their charging currents. I used an app called BatteryMonitor on my Desire HD, I'm sure there's others around now that give the same information. If someone could try out different chargers and record charging current over time, maybe even with a pretty graph, it'd surely help all future discussions about chargers, docks, modifications, DIY charging issues etc.
Click to expand...
Click to collapse
So, as the same goes for the Z3: If someone can record their charging times, charging current and charger used: Go ahead and post it. Bonus points for taking a look at magnetic charging.

dragonfet said:
Hiya,
I'm copying my original post over from the Z3 Compact forum as there should be a fair amount of similarities between the two models regarding battery charging.
So, as the same goes for the Z3: If someone can record their charging times, charging current and charger used: Go ahead and post it. Bonus points for taking a look at magnetic charging.
Click to expand...
Click to collapse
A recent tear down confirms the Qualcomm chip for Quick Charge 2.0 support, so what we need now is for someone to get a compatible PSU that can 'talk' to the phone and then supply more power. That should see a huge improvement in charge time.
I am just trying to find a source for a compatible charger. So far I've only seen the Motorola Turbo Charger in the USA, and I'd be wary of buying anything made by a no-name brand at this point.
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.

jonmorris said:
A recent tear down confirms the Qualcomm chip for Quick Charge 2.0 support, so what we need now is for someone to get a compatible PSU that can 'talk' to the phone and then supply more power. That should see a huge improvement in charge time.
I am just trying to find a source for a compatible charger. So far I've only seen the Motorola Turbo Charger in the USA, and I'd be wary of buying anything made by a no-name brand at this point.
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.
Click to expand...
Click to collapse
I have read excellent reviews for the Blackberry Premium Charger (the one with the yellow tip), super cheap on Amazon right now. Recommended by Android Central and others for its 2A charging capability. I have used it in the past from my HTC One X days and have re ordered for my Z3. Honestly, my Z3 is charging more than fast enough with the OEM supplied charger, which may be less powerful but more optimised than another OEM's charger. The one I'd trust most if I was forced to use one would be the above model of the BB charger.

jonmorris said:
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.
Click to expand...
Click to collapse
more power can either be achieved through more voltage (that could potentially be harmful if the hardware is not compatible) or more current. More current is 100% save as the charging circuit just takes what it needs, independent of the (more potent) capabilities of the charger.
As Oppo showed with its find 7 just raising the current is a viable option which works. This is also a Snapdragon 801 device.

With the 1.5A original charger and cable, using Battery Monitor Widget shows the charging rate at around 900mA to 1000mA.
So I guess Z3 is restricting to max 1A charging?

jonmorris said:
I have to assume the magnetic charging option won't be as fast, simply as there can't be a way for the PSU to know it is connected to a compatible device. Quick Charge 2.0 appears to require some sort of handshaking, or else the PSU will limit the power output, hence why I'd be wary of any chargers appearing on eBay or Amazon that claim to offer fast charging.
Click to expand...
Click to collapse
Would it be possible that the PSU simply always limits the power output? For example, the phone might try to draw 1.5A, but the PSU doesn't support it and limits at 1.0A. Then magnetic charging could work with 1.5A or even 2.0A without the need for communication over the D+ / D- pins. (And attaching the magnetic port with a USB adapter to a PC or Laptop might cause the USB Port to shut down and trigger an overcurrent warning.)
AKK03 said:
With the 1.5A original charger and cable, using Battery Monitor Widget shows the charging rate at around 900mA to 1000mA.
So I guess Z3 is restricting to max 1A charging?
Click to expand...
Click to collapse
That would make sense. Though wonder where the extra 500 mA are going, it surely can't be the phone's standby. And given a typical maximum charging current of 1.0C (C = battery capacity), it would translate into 3.1A of charging current and therefore a 3.5A power supply.
Is this current constant from 1% to about 65%?

AKK03 said:
With the 1.5A original charger and cable, using Battery Monitor Widget shows the charging rate at around 900mA to 1000mA.
So I guess Z3 is restricting to max 1A charging?
Click to expand...
Click to collapse
If there are restrictions they are most likely within the Kernel and we may be able to change them in the future with custom Kernels

dragonfet said:
That would make sense. Though wonder where the extra 500 mA are going, it surely can't be the phone's standby. And given a typical maximum charging current of 1.0C (C = battery capacity), it would translate into 3.1A of charging current and therefore a 3.5A power supply.
Is this current constant from 1% to about 65%?
Click to expand...
Click to collapse
There is some fluctuation, but is roughly around 1A.

I have test 2 different charger
from "Battery Monitor Widget Pro" logs
with EP880 (1.5A max)
show ...................... 1.1A max
with 2 Amp charger
show .....................1.5A max

maxx228 said:
I have test 2 different charger
from "Battery Monitor Widget Pro" logs
with EP880 (1.5A max)
show ...................... 1.1A max
with 2 Amp charger
show .....................1.5A max
Click to expand...
Click to collapse
Thanks for the results. I have my Z3 by now and recorded some as well.
From 0 to 68%, it charges with 1000-1100 mA, then it goes into CV (constant voltage) mode and stays there until 95%. Then the curent drops slightly. The rest of the charging curve is not usable, as it was the first full charge my handset had. And the last for now, as I have to send it back due to a gap in the frame and microphone issues.
I'll post a complete curve when I have the new one and did a few cycles. What's clear for now:
1. Charging current with the stock charger is around 1.1 A max.
2. The phone charges up to 95% with 0.5% per minute. (Stock Charger)
3. It drops to 0.125% between 95% und 100%, likely to put less strain on the battery.
It's nice to see that there's appearantly support for higher charging currents. Though we should keep in mind that a higher current also means more stress for the battery, especailly when the phone is used while charging (higher battery temperature as the CPU also adds heat).

my Z3 came with the charging dock dk48.. it is rated at 1.8a, charging is fast

I can't speak to the Z3 (yet), but my Z1s charges nearly twice as fast on the magnetic charging dock as it does through the USB connection. As a result, I can leave my screen on at full brightness while on the dock and still charge. I would *expect* similar behaviour from the Z3.

Original charger: about 1.0A - 1.1A. Result: 3h 50p - 4h for fully charged.
Magnetic charging dock or cable: 1.5-1.6A. Spend only 2h 45p
I'm tesing Xiaomi MI Power Banki 10400mAh. First test: 1.6A, much faster than original charger. A bit surprise!
http://www.mi.com/sg/mipowerbank/

Zanr Zij said:
Original charger: about 1.0A - 1.1A. Result: 3h 50p - 4h for fully charged.
Magnetic charging dock or cable: 1.5-1.6A. Spend only 2h 45p
I'm tesing Xiaomi MI Power Banki 10400mAh. First test: 1.6A, much faster than original charger. A bit surprise!
http://www.mi.com/sg/mipowerbank/
Click to expand...
Click to collapse
The original charger is rated 1.5A, actual charging on Z3 is 1.0A.
Xiaomi is rated 2.1A, so I guess is reasonable to expect 1.5A actual charging from it.
For your magnetic charging dock or cable, are you using the original charger?
With the original charger, I'm getting the same result with or without dock.

Zanr Zij said:
Original charger: about 1.0A - 1.1A. Result: 3h 50p - 4h for fully charged.
Magnetic charging dock or cable: 1.5-1.6A. Spend only 2h 45p
I'm tesing Xiaomi MI Power Banki 10400mAh. First test: 1.6A, much faster than original charger. A bit surprise!
http://www.mi.com/sg/mipowerbank/
Click to expand...
Click to collapse
where did you get the magnetic charging cable?

AKK03 said:
The original charger is rated 1.5A, actual charging on Z3 is 1.0A.
Xiaomi is rated 2.1A, so I guess is reasonable to expect 1.5A actual charging from it.
For your magnetic charging dock or cable, are you using the original charger?
With the original charger, I'm getting the same result with or without dock.
Click to expand...
Click to collapse
With Mi Power Bank, I used micro USB cable, not magnetic.
I'm using Samsung Note 3 2.0A charger. Through micro USB port, I got lower current, about 1.0-1.2A but with magnetic cable 1.5-1.6A.
---------- Post added at 11:31 AM ---------- Previous post was at 11:30 AM ----------
Shudder123 said:
where did you get the magnetic charging cable?
Click to expand...
Click to collapse
Included in my Z3 retail box

Zanr Zij said:
With Mi Power Bank, I used micro USB cable, not magnetic.
I'm using Samsung Note 3 2.0A charger. Through micro USB port, I got lower current, about 1.0-1.2A but with magnetic cable 1.5-1.6A.
---------- Post added at 11:31 AM ---------- Previous post was at 11:30 AM ----------
Included in my Z3 retail box
Click to expand...
Click to collapse
you mean the USB cable?

Shudder123 said:
you mean the USB cable?
Click to expand...
Click to collapse
My Z3 Dual retail box has 2 cables: usb and magnetic

Zanr Zij said:
My Z3 Dual retail box has 2 cables: usb and magnetic
Click to expand...
Click to collapse
where did you get yours from? mine only came with a USB cable

I have a z3 dual .. I did not notice the second cable in the box. I have to check again

Dash Charging all the time?

Hello, guys, I need your help because I believe in the community of our forum.
I am wondering about the Dash charging.
1) Is it bad if I use the Dash all the time (every day)?
2) If I use a third party charger, in my case Anker charger (no quick charge), will this affect the system or the internals somehow?
A friend of mine is using 1+3T and he does not like to change his device often but per two years once. And that's why he is using a regular charger without any fast-charging capabilities for a mainly charging solutions. And he uses the Dash Charger really rarely (like once a week), only when he is short on time and needs battery.
I, personally, think that there is good logic in his method of charging his device, but this is only my opinion, I am not acknowledged and that's why I want your help.
What do you think about question 1) and 2) and also about my friend's method of charging.
If I think of another question I will post it later as a comment. Waiting on your replies, mates.

1. It is not. Dash charging keeps all the heat on the brick of the adapter. Your phone is safe.
2. No, it won't affect internals.

OnePlus has put the charging control electronics into the charger, keeping a lot of the heat away from the phone. But as far as my limited understanding of battery chemistry goes, it's not just the heat that ages battery cells, but the higher voltage used to charge them.
While it is impressive to see the phone charging with the Dash charger, it certainly won't help extend the life of the battery. Dash charge can push the limits of charging speed by moving heat away from the battery, preventing the phone from outright overheating, but the battery's chemistry is still put under greater strain from the higher charging current.
Even if it's only the heat that ages a battery, and the charging speed itself makes no difference at all - does the phone actually stay cooler when using Dash charge than when using a regular 5V charger?
Unfortunately OnePlus' marketing materials suggest that you should only charge your OnePlus 5 with the Dash charger, but they're just that - marketing materials. What would you have them say? "Don't use Dash charge too often since it's actually really bad for your battery" isn't exactly confidence inspiring.
The electronics for charging via regular USB, or via USB-C Power Delivery, are all there. Compared to always pushing the battery as close to its limits as possible, I cannot see the slower charging modes being worse for your battery life.
I use the Dash charger only when I have very limited time to charge my phone. When I regularly charge my phone over night, I do that as slowly as possible using a regular 5V charger. I wouldn't mind the phone taking six hours to charge overnight.

Speaking of charging, can we use quick chargers 2.0 with this phone? Does it charges quicker?
I have an Aukey quick charge 2.0.

NetSoerfer said:
I use the Dash charger only when I have very limited time to charge my phone. When I regularly charge my phone over night, I do that as slowly as possible using a regular 5V charger. I wouldn't mind the phone taking six hours to charge overnight.
Click to expand...
Click to collapse
I follow the same approach. I charge my OnePlus 5 every night with the charger of my "old" OnePlus X.
A couple of weeks ago I charged it every second or third day, and waited always till the battery is almost empty.
After I read the information provided by this XDA thread and the additional information in this article. I decided to limit the capacity and charge it every day.
So my battery is swinging about between 30% and 80%.
When on travel or time is limited I use dash charge.

dima-82 said:
After I read the information provided by this XDA thread and the additional information in this article. I decided to limit the capacity and charge it every day.
So my battery is swinging about between 30% and 80%.
Click to expand...
Click to collapse
This is actually awesome, being able to limit charging to an arbitrary percentage. I don't have root yet, but this one is definitely bookmarked.

NetSoerfer said:
This is actually awesome, being able to limit charging to an arbitrary percentage. I don't have root yet, but this one is definitely bookmarked.
Click to expand...
Click to collapse
As soon as the battery reaches 80% the BatteryChargeLimit Service stops charging and starts it again if the battery falls beyond 77% (The values are adjustable).
While charging (connected to charger) and waiting (connected / disconnected) till the lower threshold is reached a notification with the current voltage and battery temperature is shown.
We can cheat the electronic and move the charging logic to the charger, but we still have the physical and chemical constraints of batteries. So I thing this is a acceptable way to keep the battery as long as possible in a good condition.

NetSoerfer said:
OnePlus has put the charging control electronics into the charger, keeping a lot of the heat away from the phone. But as far as my limited understanding of battery chemistry goes, it's not just the heat that ages battery cells, but the higher voltage used to charge them.
While it is impressive to see the phone charging with the Dash charger, it certainly won't help extend the life of the battery. Dash charge can push the limits of charging speed by moving heat away from the battery, preventing the phone from outright overheating, but the battery's chemistry is still put under greater strain from the higher charging current.
Even if it's only the heat that ages a battery, and the charging speed itself makes no difference at all - does the phone actually stay cooler when using Dash charge than when using a regular 5V charger?
Unfortunately OnePlus' marketing materials suggest that you should only charge your OnePlus 5 with the Dash charger, but they're just that - marketing materials. What would you have them say? "Don't use Dash charge too often since it's actually really bad for your battery" isn't exactly confidence inspiring.
The electronics for charging via regular USB, or via USB-C Power Delivery, are all there. Compared to always pushing the battery as close to its limits as possible, I cannot see the slower charging modes being worse for your battery life.
I use the Dash charger only when I have very limited time to charge my phone. When I regularly charge my phone over night, I do that as slowly as possible using a regular 5V charger. I wouldn't mind the phone taking six hours to charge overnight.
Click to expand...
Click to collapse
That is why dash charging only matters from zero to 60%. After 60% it reduces the speed of the charge at 75% then again then again at 85% and again at 95%. It's not all about the heat but one the battery is at a certain level, you can't charge at the high speeds as that causes instability in the chemical reaction. Even QC quick charge slows down as well.

gonsa said:
Speaking of charging, can we use quick chargers 2.0 with this phone? Does it charges quicker?
I have an Aukey quick charge 2.0.
Click to expand...
Click to collapse
You can use any charger that supports 5v output. a qc 2.0 or 3.0 charger in this case acts like a regular charger.
the difference between quickcharge and dashcharge is that a qc increases the power through a higher voltage with lower current whereas a dc uses lower voltage with higher current.

1) Using the dash charger every time will not harm the battery or reduce its lifespan in a notable way. First of all, you only get dash charging speeds until the battery reaches 60% once there the charger reduces the output and yet again at 75% and 85% of battery capacity. This is to prevent over voltage of the battery cells which is one of the two main factors in reducing battery capacity and lifespan. The other factor that hinders battery capacity and lifespan is temperature, however, dash chargers use a nifty trick to reduce battery temperature when charging, the adapter converts the power to the battery's voltage instead of leaving the power conversion to the phone itself, this helps the phone stay cooler when charging which helps with the battery lifespan.
The one thing that you shouldn't do is keep the phone plugged in after fully charging the phone or leaving the phone charging overnight. Having the battery at 100% capacity for too long will keep it at a very high charge voltage which will reduce the amount of charge cycles of the battery. The best range to keep a Li-ion battery for a long lifespan is between 60% and 95% capacity.
2) You can use any type of charger on the 1+5 as long as it's a 5V charger. However, you won't get the charging speeds dash charger offers and since those chargers don't handle the power conversion, your phone will have to which means it might heat up a little bit more than with the dash charger.

1) ofc not.
2) no.
Will i believe the sweetest thing in this phone is about the fast charging time (Dash)
like i have my OP3 for a year now and i only use the Dash charger with it
even tho the battery still good for me

Cmon !, YES it will.
This is not a magic box people, Lithium Polymer batteries will react just like other lithium based batteries : in fonction of temperature, number of time of polarity change, load usage, and time.
This is a chemical reaction, you'll have oxydation: speed and quty in fct of previous factors. you can find a ton of info about this online, or in school.
So far a good battery that can take huge charges are Li-Fe, but the capacity is lower.
Those mobile phones batteries are good, but you will decrease their life under 20 W (5v @4A) load charge for sure !
This as been said, I know that op5 will regulate, but at the highest power that the battery can take, wich is always too high to make your phone last long with the maximum capacity you can get with a good maintenance.
I'll recommend more like 2.1, or personnaly, 1.2 A charger. Do not go lower, you'll have other issue, like crystallization.
I can explan in more scientific method, since I worked on electric race cars, but this site will explain the essentials.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Is this a big noticable difference in your everyday usage ?? No, I don't think so. You'll see the difference in 5-6 years, when the phone will be slow and the cpu will max out, and you'll do 6 hours on a 1200 mAh battery capacity since the maintenance was bad.

A couple of days ago I installed Charge Monitor (thx @waterdaan) and monitored the charging curve with different chargers on my OnePlus 5.
Here the results:
OnePlus Dash Charger, 36% - 97% in 56 minutes:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Charger from OnePlus X (standard 5V/2A USB charger), 33% - 93% in 79 minutes:
This confirms, what in this thread was already mentioned by some users. Dash Charger reduces the current at certain capacity levels.
So I think we are good to go with the dash charger and shouldn't worry that it harms our batteries.
Additionally I checked other battery apps and found Battery Warner by @P1xelfehler which can also be found on the PlayStore. This app tries to combine the capabilities of Charge Monitor and Battery Charge Limit but is less powerful as the other two.
My conclusion is: I will use the Dash Charger and Battery Charge Limit to keep the capacity between 30% and 80% for the normal daily use.
To monitor the charging process one of the above mentioned apps above is a must have. Almost all apps on the market, which promise you to extend battery life (Battery Doctors, Battery Savers, Battery Boosters, you name it...) have no effect at all and may even damage your battery.
If my assumptions are wrong, please correct me

dima-82 said:
If my assumptions are wrong, please correct me
Click to expand...
Click to collapse
I use the dash charger cause as for me the current looks more stable than while charging with other chargers as shown in your example.
Btw I'm using Charge monitor as well, very good app

oVeRdOsE. said:
I'll recommend more like 2.1, or personnaly, 1.2 A charger. Do not go lower, you'll have other issue, like crystallization.
Click to expand...
Click to collapse
Then, do you recommend to use a 1.2A charger through the night?

Aukey USB PD with PPS

Will this charger charge our device st 45w?
http://www.gadgetexplained.com/2018/09/aukey-pa-y12-fast-charging-72w-pps-usb.html?m=1

Machine_Head said:
Will this charger charge our device st 45w?
http://www.gadgetexplained.com/2018/09/aukey-pa-y12-fast-charging-72w-pps-usb.html?m=1
Click to expand...
Click to collapse
I got one and it seems to work. Usually original would show about 60 minutes to completely charge where this one charges in 44 minutes.
This is at 48%.
When started I've had phone to 20% and has charged up to 60% within 20 minutes or so. So it seems to be but don't know how to exactly check or likely don't have the tools to see if it is going at 45w or less.
But this has worked for me quite well. As rather have multiple when traveling.
Sent from my SM-N975U1 using Tapatalk

The variable voltage and current via the Power Delivery port of the AUKEY charging station means voltage and current varies according to the device between 5V 3A, 9V 3A, 12V 3A, 15V 3A and 20V 3A.
No it won't deliver 45w to the Note 10+

DaPoets said:
The variable voltage and current via the Power Delivery port of the AUKEY charging station means voltage and current varies according to the device between 5V 3A, 9V 3A, 12V 3A, 15V 3A and 20V 3A.
No it won't deliver 45w to the Note 10+
Click to expand...
Click to collapse
Good to know thanks. It is still quicker than most chargers I've gotten. So I'm good with it as it is more than enough for what I'll likely use and charge. But with this info it will then all depend on others. I'll likely later check the 45w official to see if it is really much if a difference but this works better for me and gives good battery for the charge time than I'm used to.
Sent from my SM-N975U1 using Tapatalk

DaPoets said:
The variable voltage and current via the Power Delivery port of the AUKEY charging station means voltage and current varies according to the device between 5V 3A, 9V 3A, 12V 3A, 15V 3A and 20V 3A.
No it won't deliver 45w to the Note 10+
Click to expand...
Click to collapse
The above statement isn't entirely accurate.
In basic DC electrical circuits the following formula applies:
P = V x I where:
P = Power of the circuit
V = Voltage applied to the circuit
I = Amount of current flowing in the circuit
Following this formula, this power supply can deliver 45 w at the 15 volt and 20 volt levels.
More importantly though is the fact that this power supply is of PPS variant. Meaning that it can listen to and adjust the voltage and current to the device it is charging, provided a specific cable is also used. (I will provide a link below).
So how does this new charging standard for cell phones work?
When the phone is first connected, it checks that the cable and power are capable of PPS type charging. If they aren't, it will charge the older way of just accepting a constant voltage to charge.
If it is the proper "faster" charging PPS type, then it looks at the current battery charge level and then "instructs" the power supply to provide a certain voltage level. The closer the current battery charge is to 0, the higher the voltage it will tell the power supply to deliver. So, if the battery is near 0, it will ask up to 20 volts from the power supply. So, at 20 volts and at a maximum of 3 Amps, that is how this power supply can provide 60 watts. (See above formula). Our phone can only accept 2.25 Amps at 20 volts, hence 45 Watt charging.
So, the closer the battery level was closer to 0, the fast this charger will charge..... for a time.
Once the battery gets closer to a full charge or the battery temperature is too high. Yes they monitor battery temp, this came out of the Note 7 debacle. It will tell the power supply to reduce the voltage, hence reducing the power (wattage) level to the battery and slowing the charging rate. This typically happens between 70-80% of full charge.
Sorry if this was sooo long.
This is the US version of the above power supply.
https://www.amazon.com/dp/B07HJWMYH5/ref=cm_sw_r_cp_apa_i_-BgFDbP18G9WV
This is the required cable to go with it.
Anker Powerline II USB C to USB C 2.0 Cable (6ft) USB-IF Certified, Power Delivery PD Charging Cable
https://www.amazon.com/dp/B071WNXY1R/ref=cm_sw_r_cp_apa_i_5DgFDb6V78HJY
Remember all of this just happens when connected to the USB-C port of the charger. The other ports do not support the new charging standard.

Yes it’s too long of a post for this type of forum. We all get it you have some knowledge in electrical theory and its quite notable.
Still, @DaPoets post is accurate in this case because samsung have certain requirements to get a charge to output exactly that unique charging state the phones circuitry will accept. This is used by handshaking betwixt the Emarker chips on the cable and the battery controller in the phone.
Although the charger in question maybe able to output the current as its listed on the charger itself, there still needs to be certain protocols in place that only samsung know to make a charger output that unique voltage.
Of course in time 3rd party chargers will eventually appear but its highly unlikely any 3rd party charger at this point can output that exact spec.

This whole Samsung charger tech has everyone confused and like the following article states they want to sell you there Branded chargers. That's fine, but these style chargers need to be paired with a specific "IF- certified" cable, which has chips in both ends and aids in the handshaking between phone and charger.
So, based on this article, a power supply that utilizes the PD 3.0 standard with PPS ability should fit the bill. Therefore the power supply that the original poster asked about DOES fit that bill, provided it is paired with the correct cable.
https://www.extremetech.com/mobile/...le-to-find-a-45w-fast-charger-for-the-note-10

Here is a good Reddit thread on the subject.
https://www.reddit.com/r/galaxynote10/comments/cws50p/
---------- Post added at 09:26 PM ---------- Previous post was at 09:15 PM ----------
One more post and I'll let this go.
Here is a review of an Aukey third party 45w charger. He got the same results as the OEM 45w charger.
So, to out this to bed, there are chargers available, but you really have to pay attention to the charging specs.

USB-IF are e marker cables. same thing I said.
there is no hype in what the sammy 45 W can do. there are 3rd party chargers that can output many watts/amperage of power, but if they don't have the right handshake that the sammy battery controller is looking for, the phone wont do 45W at the unique voltage the note 10 is looking for.

lmanlo said:
I got one and it seems to work. Usually original would show about 60 minutes to completely charge where this one charges in 44 minutes.
This is at 48%.
When started I've had phone to 20% and has charged up to 60% within 20 minutes or so. So it seems to be but don't know how to exactly check or likely don't have the tools to see if it is going at 45w or less.
But this has worked for me quite well. As rather have multiple when traveling.
Click to expand...
Click to collapse
What cable did you use?

ronjr123 said:
The above statement isn't entirely accurate.
In basic DC electrical circuits the following formula applies:
P = V x I where:
P = Power of the circuit
V = Voltage applied to the circuit
I = Amount of current flowing in the circuit
Following this formula, this power supply can deliver 45 w at the 15 volt and 20 volt levels.
More importantly though is the fact that this power supply is of PPS variant. Meaning that it can listen to and adjust the voltage and current to the device it is charging, provided a specific cable is also used. (I will provide a link below).
So how does this new charging standard for cell phones work?
When the phone is first connected, it checks that the cable and power are capable of PPS type charging. If they aren't, it will charge the older way of just accepting a constant voltage to charge.
If it is the proper "faster" charging PPS type, then it looks at the current battery charge level and then "instructs" the power supply to provide a certain voltage level. The closer the current battery charge is to 0, the higher the voltage it will tell the power supply to deliver. So, if the battery is near 0, it will ask up to 20 volts from the power supply. So, at 20 volts and at a maximum of 3 Amps, that is how this power supply can provide 60 watts. (See above formula). Our phone can only accept 2.25 Amps at 20 volts, hence 45 Watt charging.
So, the closer the battery level was closer to 0, the fast this charger will charge..... for a time.
Once the battery gets closer to a full charge or the battery temperature is too high. Yes they monitor battery temp, this came out of the Note 7 debacle. It will tell the power supply to reduce the voltage, hence reducing the power (wattage) level to the battery and slowing the charging rate. This typically happens between 70-80% of full charge.
Sorry if this was sooo long.
This is the US version of the above power supply.
https://www.amazon.com/dp/B07HJWMYH5/ref=cm_sw_r_cp_apa_i_-BgFDbP18G9WV
This is the required cable to go with it.
Anker Powerline II USB C to USB C 2.0 Cable (6ft) USB-IF Certified, Power Delivery PD Charging Cable
https://www.amazon.com/dp/B071WNXY1R/ref=cm_sw_r_cp_apa_i_5DgFDb6V78HJY
Remember all of this just happens when connected to the USB-C port of the charger. The other ports do not support the new charging standard.
Click to expand...
Click to collapse
A very good read. Thank you for you and everybody else's input.
Any cable that are e-marked should work, right?
Will get this charger just to satisfy my curiosity. ?

You lost me at P =
ronjr123 said:
The above statement isn't entirely accurate.
In basic DC electrical circuits the following formula applies:
P = V x I where:
P = Power of the circuit
V = Voltage applied to the circuit
I = Amount of current flowing in the circuit
Following this formula, this power supply can deliver 45 w at the 15 volt and 20 volt levels.
More importantly though is the fact that this power supply is of PPS variant. Meaning that it can listen to and adjust the voltage and current to the device it is charging, provided a specific cable is also used. (I will provide a link below).
So how does this new charging standard for cell phones work?
When the phone is first connected, it checks that the cable and power are capable of PPS type charging. If they aren't, it will charge the older way of just accepting a constant voltage to charge.
If it is the proper "faster" charging PPS type, then it looks at the current battery charge level and then "instructs" the power supply to provide a certain voltage level. The closer the current battery charge is to 0, the higher the voltage it will tell the power supply to deliver. So, if the battery is near 0, it will ask up to 20 volts from the power supply. So, at 20 volts and at a maximum of 3 Amps, that is how this power supply can provide 60 watts. (See above formula). Our phone can only accept 2.25 Amps at 20 volts, hence 45 Watt charging.
So, the closer the battery level was closer to 0, the fast this charger will charge..... for a time.
Once the battery gets closer to a full charge or the battery temperature is too high. Yes they monitor battery temp, this came out of the Note 7 debacle. It will tell the power supply to reduce the voltage, hence reducing the power (wattage) level to the battery and slowing the charging rate. This typically happens between 70-80% of full charge.
Sorry if this was sooo long.
This is the US version of the above power supply.
https://www.amazon.com/dp/B07HJWMYH5/ref=cm_sw_r_cp_apa_i_-BgFDbP18G9WV
This is the required cable to go with it.
Anker Powerline II USB C to USB C 2.0 Cable (6ft) USB-IF Certified, Power Delivery PD Charging Cable
https://www.amazon.com/dp/B071WNXY1R/ref=cm_sw_r_cp_apa_i_5DgFDb6V78HJY
Remember all of this just happens when connected to the USB-C port of the charger. The other ports do not support the new charging standard.
Click to expand...
Click to collapse

Machine_Head said:
A very good read. Thank you for you and everybody else's input.
Any cable that are e-marked should work, right?
Will get this charger just to satisfy my curiosity. ?
Click to expand...
Click to collapse
This is the 6.6 ft cable I ordered. I use this only for my charging needs, so didn't I care about video support.
What I did want was an IF-Certified 100w cable.
Works good.
Cable Matters USB-IF Certified USB C to USB C Cable 100W Power Delivery in Black 6.6 Feet (USB 2.0 Speed, No Video Support) https://www.amazon.com/dp/B0756QGTVQ/ref=cm_sw_r_cp_apa_i_J4bGDb9SM15WH

Bumping an old thread...
I see this and the reddit post saying the aukey charger works. But the Amazon listing for the charger specifically says it cannot fast charge the note 10.
I'm confused.

edit

10V - 4.5A is what the Note 10 plus takes for 45w charging and that one doesn't seem to do that but Samsungs own 45w charger is dropping in price, I got mine for 37 quid a few weeks ago and there's also the Elecjet PowerPie 45 PPS powerbank you can get for between 50 and 60 quid
https://www.amazon.co.uk/ELECJET-Po...owerpie&qid=1584195250&sprefix=Elecjet&sr=8-1
https://elecjet.co.uk