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Not charging when connected with PC

I recently bought new tab, it is getting charged normally when plugged in power socket. But when i plug it in laptop USB port or any PC port, it would not charge instead I can transfer data etc. I am using the original USB cable which came in box. Does any one has faced same issue?
Sent from my GT-P1000 using XDA App

charging
Samsung have engineered it so you have to even use their mains charger. Car chargers and wall chargers have to be Samsung tab brand. Not sure but there is talk of AVUSB charge cable being released. Pretty sure this has already been covered.

Turn off the screen and wifi and data network and it will charge very slowly over usb.
Sent from my SGH-T849 using XDA App

The fact of the matter is the tablet requires more/not the right amount of power that your USB port can deliver.
We always here all these theories about why.. but here is the simple and only reason why.
To keep the techinical stuff short and simple, Li-Poly and other batteries have a predetermined lifetime and one of the determining factors to how long they last is the rate of charge (charge rate) time and the exact amount of mHa capacity of the battery.
This is NOT a Samsung marketing scheme as it is exactly the same reason the iPad cannot be charged through USB.
I'll give you a quick example:
If you buy rechargable batteries, Ni-Mh that state they can be charged at 2500mHa (capacity/rate) and you charge them on a 15 minute charger that delivers the right amount of power (1.2 volts) and not the correct rate (lets say they are rated for 2500 and you use a charger thats rated for more) this causes the battery life to be deminished drasitcally.
If you charge the same 2500mha batteries with a lower rating charger, they will take a lot longer to charge completely since it is at a slow mHa, but also this slower charging will provide a longer battery life.
Therefore their charger (and this is the reason why you must use their charger or any charger with the same mHa rating) is made to provide the optimal amount of charge rate (mHa) giving you the best battery life vs charge time.
In conclusion the Tabs hardware will limit the rate of charge through USB in order to:
a) Not overload the power on your USB, given that all this varies according to each system configuration (although it should not! but reality is.. it does)
and
b) In order to not improperly charge your tab, reducing your battery life.
I know the technical parts are vaguely/poorly explained but I work with Li-Po and other types so this is the simplest way to explain all this without causing too much confusion.
Hope this made sense
Cheers

tj1984 said:
Samsung have engineered it so you have to even use their mains charger. Car chargers and wall chargers have to be Samsung tab brand. Not sure but there is talk of AVUSB charge cable being released. Pretty sure this has already been covered.
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Not true.
Samsung is using standard chargers that are wired to identify themselves as high current chargers. A non Samsung charger / external battery will likely have the same wiring because this wiring is part of the usb-specification.
The Tab will even charge from your usb-port but only slowly and if you turn off the screen since usb-ports only have 500mA (the charger has 2A).
So all the Tab does is check for this high-power-wiring. If it detects it it shows you the charge-icon, if it doesn't it assumes a usb-connection to your computer and does not pretend to charge (even if it does).

Interesting! So then a generic car cig lighter accessory with a standard USB port on it should charge it as a high output conection, right?

I am able to charge my Tab using usb connection to my PC by turning the device off. Same with an Energizer XP8000 external battery. Leaving the device on will take a long time to charge or not at all if you are using it while charging.

Charging while in use

If I have the screen on while plugged in, my battery % continues to drop and the device itself feels kind of hot. Could I have a problem or is this normal?
My battery life has also not been so great.

perigee said:
If I have the screen on while plugged in, my battery % continues to drop and the device itself feels kind of hot. Could I have a problem or is this normal?
My battery life has also not been so great.
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Are you using the OEM charger?

perigee said:
If I have the screen on while plugged in, my battery % continues to drop and the device itself feels kind of hot. Could I have a problem or is this normal?
My battery life has also not been so great.
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Mine doesn't it keeps going up, though I haven't tried playing games. It does depend on what you are doing with the device, if you are running applications that max out the processor it will possibly drop.
The GSII would drain while plugged in if the screen was on. You would see a noticeable drain while using GPS and Music and driving. The only way to make it work was to turn the screen off on the device, the GSIII has a better charging chip in it, and it isn't limited to 650maH (from what I can tell since it is charging when using GPS)

I noticed it while using a usb car cigarette adapter as well as a usb port on my laptop. the car adapter is a 2 amp charger capable of charging a tablet. I will see how it performs with the oem wall charger.
Sent from my SAMSUNG-SGH-I747 using XDA

Yeah I was charging my phone earlier using a car was adapter with the oem micro usb cable and they phone got very hot.
What do you guys think? Is this a cause for concern? Do I need to buy a manufacturer approved adapter?

Is it safe to leave the phone plugged in overnight? I usually charge the phone when I go to bed, but I've the this might damage some batteries.

hyped89 said:
Is it safe to leave the phone plugged in overnight? I usually charge the phone when I go to bed, but I've the this might damage some batteries.
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I'm curious about this myself....I'm leaning towards not leaving mine plugged all night. I 2 have done this in the past with other phones and can't be certain but maybe this is a rEason I had horrible batt life despite efforts to Better it. So I'm gonna stick with charging/topping off when I can. Gonna start just charging when I wake up while I'm getting ready for work. I did notice that when battery is completely charged a message comes up telling u so and to unplug. So I'm gonna follow directions haha.
Sent from my SAMSUNG-SGH-I747 using XDA

All modern smartphones have chips that control power, and cycle charging appropriately to not abuse the battery. Many phones monitor the temp of the battery and such to ensure a good and safe charge. You can leave it plugged in overnight just fine..

It definitely doesn't like 3rd party adapters. I'm hoping it will at least accept the tab adapter with samsung's cable so that I can charge it at work without buying a dozen chargers, but...
(One charger I used is understandable - turns out its only 300ma. Whoops! But using full 1A chargers wasn't helping either, it went up maybe 1% every 15 mins. The stock charger ran it up fast enough that it was charged from 70% in under an hour.)

I use SetCPU and have a setting to reduce the clock when it exceeds a temperate parameter. You could also set a max clock for when it is plugged into a USB (Computer/Car charger). That could help it stay cooler and charge faster while not plugged into the wall.
I charged from empty to full this morning when plugged into the wall in about 3 hours. I haven't tested on my computer yet.

I went through this when I first got my Evo 4G. I did not realize at the time that the 500mA charger I was using with my Blackberry Storm (horrible device) would not charge my Evo while doing anything power intensive (like using GPS) and I quickly drained it on a car trip.
I went on Amazon and bought a $20 Schosche iPad charger that claimed to provide 2.1A which should be plenty. On that charger the phone would charge while using GPS but very, very slowly.
After some more research I found that some chargers caused the phone to switch into "USB" charging mode and others would switch it to "AC" mode which would draw much more power and charge faster.
This is the charger I ended up with and it works great:
http://www.monoprice.com/products/p...=10826&cs_id=1082602&p_id=6766&seq=1&format=2
My Evo charges just as fast as it does on the OEM wall charger. I don't have my SIII yet (thanks Verizon for being the LAST in the US to ship them out...) so I can't yet say if this holds true for the SIII but I assume it will. At $1.22 it's not much of a gamble.

[Q] Pogo Cable Issue

Hello there developers,not sure if I'm posting on the right place but I have a really big problem. My new Pogo Cable arrived and I was so excited to use it,but my happiness didn't lasted fort too long. The problem is that the Tablet while charging with the Pogo cable is either charging slow ,or neither at all. This issue is available for both Lollipop and Kit-Kat,have upgraded an then downgraded with the hope that the issue will be solved. The original Micro -Usb cable works good but with the Pogo Cable in the Battery Monitor Widget it appears "Discharging" and "AC Plugged",and the charging rate is booring slow. Had the idea to measure the Voltage and the current Flow with a multimeter and got the surprise that while the voltage is 5.12 V the amperage is 0.12 A ,while the original charger pumps up to 2 Amps. Could this be the issue? Is there some electrical switch that should open and release all those 2 Amps or is this Cable a Hoax or something that is not fully functional? Thanks in advance,hope that you guys will enlight me somehow!

I've no idea if this is related but be aware that having your pogo plug connected while also having anything connected to the microUSB will stop charging. The charging icon (lightning bolt) will still appear but that I'd a false indicator. This limitation is due to the Android kernel and is present in all versions of Android.
I exclusively use a pogo plug to charge my Nexus 10 and it has always worked on all versions of Android including 5.0.2 which I'm on today. For me pogo plug charging has always been about 25 percent faster then USB charging.
Sent from my Nexus 10 using XDA Premium HD app

My experience is exactly the same as 3DSammy reports.

well my warranty is expired so i Decided to "surgically" dissmantle my Nexus 10 in a heroic attempt to find the cause and I have made a breakthrough (or at least I tought so). I got another Pogo cable ,and this one was good,the voltage was exactly 5 Volts measured and the Amperage that I got was 2.21 Amps measured with a 6 Ohm fuse,all these values where from the original Samsung charger. All things good,but the Tablet is still not charging at all,the same Lightning animations and even after 3~4 hours still no charge at all,and this is Lame in my opinion. So after opening the tablet,I got the idea to short the 3 and 4 pogo pins together,and assumed that this will draw all the power that the battery needs to charge,the idea was working i got 20% more power draw than the usb cable BUT for only let's say Half of hour ,and then the same old story,battery was discharging but the lightning animation was on. This is not so good and my suppose is that the Power Management iC from the motherboard is some how not managing the Pogo charge at all :laugh: so my next idea is to wire the charging Pogo pins directly to the battery and hope for the best. Regards! :good:

moky900 said:
well my warranty is expired so i Decided to "surgically" dissmantle my Nexus 10 in a heroic attempt to find the cause and I have made a breakthrough (or at least I tought so). I got another Pogo cable ,and this one was good,the voltage was exactly 5 Volts measured and the Amperage that I got was 2.21 Amps measured with a 6 Ohm fuse,all these values where from the original Samsung charger. All things good,but the Tablet is still not charging at all,the same Lightning animations and even after 3~4 hours still no charge at all,and this is Lame in my opinion
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I've got one of the original n10 from first day of issue. My battery is going to hell after being used and charged every day for the past couple years. It's been on/run everyday since Dec. 2012. I have always had a problem charging while using it. My display is always set at about 1/3 bright. When my battery drops to critical, I plug in the pogo and usually put it in sleep mode to charge. It will quick charge that way.
If I still need to use it at critical battery level, plugged into the pogo plug, it maintains power and possibly gives it a very slow increase in charge. Almost none noticeable, but will maintain power level (unless tons of graphic, camera or movies along with full bright screen).
I've just taken it for granted that this is how it works. Pogo plug will maintain battery while using and will switch to quick charge once put into sleep mode or powered off. It's always acted that way, so I have never known anything different.
Ed

metaled222 said:
I've got one of the original n10 from first day of issue. My battery is going to hell after being used and charged every day for the past couple years. It's been on/run everyday since Dec. 2012. I have always had a problem charging while using it. My display is always set at about 1/3 bright. When my battery drops to critical, I plug in the pogo and usually put it in sleep mode to charge. It will quick charge that way.
If I still need to use it at critical battery level, plugged into the pogo plug, it maintains power and possibly gives it a very slow increase in charge. Almost none noticeable, but will maintain power level (unless tons of graphic, camera or movies along with full bright screen).
I've just taken it for granted that this is how it works. Pogo plug will maintain battery while using and will switch to quick charge once put into sleep mode or powered off. It's always acted that way, so I have never known anything different.
Ed
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Well I'm sure about what did you said,but in my opinion this is a marketing bulls$h*t. Why would I use that Pogo cable if it's role is to charge only on sleep mode and powered off?I ordered because I thought that like the instructions of the pogo says:" it will charge the battery even when you are using it for movies and browsing,being more handy ,because you have the micro USB port free." I play games ,I surf the web,so my tablet is hooked up to a USB hub so I have connected a mouse,a keyboard and a game controller,so my USB port is full,and I hoped the pogo will help. Charging only on sleep is equal to zero for me,I need live charging,in the same time as the tablet runs games and other stuff. In my opinion this "glitch" should have been told on the pogo site,so I could full understand this cable and it's role. Shame on Samsung,30$ .for nothing! Thanks for the help!

Charger Disappointment

Any one Disappointed with the charger they included with the Pure. The non removable cord just sucks and a poor choice in my opinion

I'm more disappointed at the size of the wall wart. They could have made more friendly to other power strip users.

razor237 said:
Any one Disappointed with the charger they included with the Pure. The non removable cord just sucks and a poor choice in my opinion
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Pretty sure they did that so you couldn't just stick any usb charging cord in their...it'd most likely fry it.

The disappointing part is the my other cords not working with Android auto. Luckily I have a nexus 6, and the cord with its charger works.
Sent from my P01MA using Tapatalk

brholt6 said:
Pretty sure they did that so you couldn't just stick any usb charging cord in their...it'd most likely fry it.
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I guess that could be a reason but highly doubt anything would be fried. Ive been using a nexus 6 turbo charger and before that i was using a note 4 charger to charge multiple android/apple devices without issue. This just limits what i can charge on a single charger now need a second lol

razor237 said:
I guess that could be a reason but highly doubt anything would be fried. Ive been using a nexus 6 turbo charger and before that i was using a note 4 charger to charge multiple android/apple devices without issue. This just limits what i can charge on a single charger now need a second lol
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If you plugged in a charging cord that can't handle the increased power it sure could fry the cord. I feel ya though...it would be nice if it were a USB cord.

I'm glad it looks different.... My son knows NOT to plug his HTC M7 into this charger.
I can see if this was someones first Android, the lack of a micro-USB for data would be frustrating, but I have about 5 of these in my desk drawer and throughout my house and office, so it doesn't bother me.

Also having a fixed cord means you don't pulg some 'slow' cable in and not get any benefits. Out my 8-10 micro USB cables, only 2-3 get a decent charge speed.

tele_jas said:
I'm glad it looks different.... My son knows NOT to plug his HTC M7 into this charger.
I can see if this was someones first Android, the lack of a micro-USB for data would be frustrating, but I have about 5 of these in my desk drawer and throughout my house and office, so it doesn't bother me.
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If a device that does not do Turbo Charging is connected, the charger should automatically adjust and charge it at regular speed. At least, that's what it is supposed to do. The Turbo Charger is supposed to be the single charger for all types.
Sent from my Nexus 10 using Tapatalk

Darnell_Chat_TN said:
If a device that does not do Turbo Charging is connected, the charger should automatically adjust and charge it at regular speed. At least, that's what it is supposed to do. The Turbo Charger is supposed to be the single charger for all types.
Sent from my Nexus 10 using Tapatalk
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Good, because I know I'll find his phone on that charger some day

I still have my galaxy s6 nexus charger that is a fast charging and it seems to work fine with turbo charging
Sent from my LG-H345 using XDA Free mobile app

I think the reason they made the cable fixed is because a lot of cheaper usb cables use very thin wire gauges. Since this charger puts out a lot of current at varying voltages, it's very possible for a thin cable to overheat easier and catch on fire. And my guess is, they didn't want to take any chances

How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
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I've got the same issue going on. My replacement from Amazon will be here Tuesday so I'll have time to mess with both and see if its the charger or what. Currently my turbocharging is hit or miss.

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
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I have this issue sometimes to. So if I need to know if im charging at turbo I use an app from the app store to see if states I'm turbo Charging or not. In the Charging screen it will say "normal or Turbo"
https://play.google.com/store/apps/details?id=com.gombosdev.ampere

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
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Click to collapse
You can use a USB voltage/current indicator device to see it directly. I use one that displays voltage and current simultaneously, it cost about $10 on Amazon.
The Qualcomm QC 2.0 (which Motorola terms "TurboPower) spec is 5, 9, 12, and 20 volts, with up to 2 amps plus at each voltage. The QC 2.0 chargers I've tested including the Motorola charger included with the XT1575, range up to 9V and about 2+ A at 9V, with the higher voltage/amperage when battery is discharged to a lower SoC.. Haven't seen 12V or 20V, I think those only come into play when battery is discharged to nearly zero SoC.
Agree the reason the included charger has cable attached may be to ensure adequate wire gage. Too-thin wire will increase voltage drop across cable thus lengthening charge time in higher power modes. But the design here uses higher voltage to keep current down around the same 2A max current of USB 2.0 chargers, so cable heat will not be a problem with any old USB cable.
I will attest to the benefit of QC 2.0. I thought it was a useless gimmick until I started using it. It does effectively compensate for mediocre battery capacity.

My "Turbo Charging" icon displays properly, but doesn't charge very quickly if connected to a cheap extension cord.
Plugged into the wall, the charging Stull doesn't impress me that much
Sent from my XT1575 using Tapatalk

DrearierJester1 said:
How do we determine if turbo charger is ongoing? I mean are there any indication? Coz when I plug in the TurboCharger that comes with it, sometimes TurboPower Connected shows at the bottom of the screen, sometimes not. Then when I check it on the Status, it says Charging over USB, not Charging over AC? Could be that my unit is defective? perhaps the charger? or the battery?
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It's defective. Call moto they will replace it for free. Just have to send copy of purchase receipt. Had the same issue.

The charge rate depends on how discharged the battery is when connected to charge.
More discharged (lower SoC, State of Charge) will drive a higher charge rate.
As to the difference between this Motorola TurboPower (aka Qualcomm Quick Charge 2.0), vs. other phones:
I've measured up to 1.4 amps at 5V nominal on other phones, that is about 9 watts charging power. That is max charge rate, with a very discharged battery. As the battery charges up closer to fully charged, the charge rate (power) is reduced. Total charging time from fully discharged to fully charged would be about 4-5 hours, give or take, for a typical cellphone battery.
For comparison, the QC 2.0 measurements I made with the MXPE: Up to 2.2 amps at 9V nominal with a phone battery discharged to about 40-50%. That works out to about 20 watts charging power. As with other Li-Ion battery charging systems, this also declines as the battery approaches fully charged. Total time to charge, from fully discharged to fully charged will be about 2-3 hours, give or take.
So the marketing claims about QC 2.0 are about right: A 75% improvement over conventional charging systems.
The biggest gains come when charging batteries discharged to lower SoC. If you are comparing charge rate/time of batteries discharged to only, say, 70-80%, you will not see as much of a difference with QC 2.0.
I'm not a QC 2.0 marketing shill, mind you. I pretty much ignored it, before buying the phone. But for this phone, QC 2.0 actually does a good job to compensate for the mediocre battery. I can run the battery down to 40-50%, put it on QC 2.0 charger in my car for my 30 minute commute, and it is charged to around 80+% when I arrive at my destination. There are a lot of QC 2.0 certified aftermarket chargers out there too, Qualcomm did a lot of work on the front end as part of bringing it to market. (Just make sure any AC charger is UL listed or equivalent, if you care about safety.
Caveats on cables: The cable does make a difference at higher charge rates. Thinner gage wire will impose a greater voltage drop at higher current, this will reduce power and thus increase charge time.
Typical USB cables are AWG 26-28. You can buy 20, 22, and 24 AWG USB cables. Some cables advertise heavier (22-24) gage wire for the power leads with standard (26-28) gage wire for the data leads. The aftermarket QC 2.0 AC chargers I bought listed their included cables as 20 gage.
Get the heavier gage if you want full QC 2.0 charging.

soufdallas said:
I still have my galaxy s6 nexus charger that is a fast charging and it seems to work fine with turbo charging
Sent from my LG-H345 using XDA Free mobile app
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Just to check did you use S6 original charger ? And does it charge same with the turbo power charger provided by moto?
Sent from my Moto X Pure (2015) via Tapatalk

5 Blinking Lights. Can't figure out what to do here....

Hey, guys and gals.
Well, I found a Nexus 7 in my car the other day and can't figure out who it belongs to. All I know is that I can't boot it up and can't charge it. All I get is 5 blinking white lights. I don't know what it means but I did some research and it seems to mean that the tablet is too dead to boot up. However, it's not accepting any charge even though I charged it overnight. All I am getting is 5 blinking lights now......before I at least got the screen turning on with an empty battery being shown. (If that makes sense)
I am not using the original charger as I don't have one and am instead using my kindle charger. Could that make a difference?
Also, there seems to be some damage around the charging port area...However, the port itself seems to be in adequate condition.
Any ideas?

If it is taking a charge it should warm up a little when it is on the charger.
No warmth == no current going in.
If the battery is so old that it is nearly dead/shorted, the tablet will get HOT when it is on the charger.
So no warmth means no battery connection, either at the USB port or at the battery connector inside the device. There are threads on here from folks who had units where the internal battery connector wasn't seated well and came loose - the teardown to that spot to seat the connector isn't too bad... search for them.
On a 2A charger it takes ~ 3-4 hrs for a 5-100% charge for a N7. That happens initially at about 1500 mA, so it is possible that the voltage on your charger simply collapses if it is only designed for say 500 MA... if that were the case no charging could occur, or only pathologically small amounts of charging could occur.
Also, the N7 has a TI charge controller chip which needs *some* small amount of juice to operate, so it is unfortunately possible for the battery voltage to get so low that the chip can't operate correctly and you get a chicken-and-egg situation where the battery can't charge, even though it is healthy - the voltage just got so low that the charging chip doesn't work. In these cases, an external charger with current limiting is needed to partly charge the tablet battery to get the voltage up high enough so it can be reconnected to the tablet and charged normally. Note that this is a 3rd scenario where you wouldn't feel any "charging warmth" even though all the connections are good.
There is a report on here of someone doing something incredibly stupid - getting some charge onto the tablet battery by disconnecting the battery connector from the tablet and directly connecting it to a car battery to charge it (That's a recipe for a battery explosion or fire). Please don't do something like that.
Something a little less stupid would be using a power resistor (e.g. 5 Watt, 30 ohms) in series with the car battery to prevent too much current from flowing. That would be safe even if the tablet battery was a dead short ( 413 mA, 5.1 Watts in the resistor ), and if the tablet battery was healthy-ish, it would trickle charge at ~ (12.4-3.0)/30 = 313 mA with 3 W dissipated in the resistor.
The important point here is that wall-wart USB chargers are designed to produce 5V up to a certain current level, but they don't actually control the amount of current; that's the job of the funky chicken-and-egg TI charging chip in the N7. So you can't just hook a 5v supply directly to the tablet battery - as you have removed the current limiting control you need something to replace that function: either something dumb to limit the current (such as a power resistor), or a slightly more advanced charger that allows you to limit the current output to a moderate maximum rate.
Note also you don't need to fully charge the battery this way; you just need to bring the charge up a few percent so it can be reconnected to the tablet and charged the "ordinary" way.
good luck

bostonbeast225 said:
Well, I found a Nexus 7 in my car the other day and can't figure out who it belongs to.
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Really? [emoji15][emoji41][emoji56]

bluebirch said:
Really? [emoji15][emoji41][emoji56]
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OP could be a cab or uber driver or something like that

Did u ever get this sorted