Database Users

How "fast" does your ATHENA charges?

I have been pondering...
Our phone is awesome in every aspect.... battery life is between 6 hrs ~ 7 hrs depending usage...
However... charging the battery seems to take FOREVER !!!!!!!!
it takes like 5+ hours to charge completely
if you want to charge it faster, wireless, phone, screen, etc needs to be off.
so that's the only inconvenient thing i found about our phone.
good thing is i can plug it in anywhere it has USB ports, including my car.

Make sure you use the correct charger. Many chargers that use the same socket do not charge at the same rate as the correct one due to internal wiring - I am not electrician but found this out the hard way.
Many USB/car chargers do not provide sufficient charge to even keep up with Athena power use.

AllGamer said:
I have been pondering...
Our phone is awesome in every aspect.... battery life is between 6 hrs ~ 7 hrs depending usage...
However... charging the battery seems to take FOREVER !!!!!!!!
it takes like 5+ hours to charge completely
if you want to charge it faster, wireless, phone, screen, etc needs to be off.
so that's the only inconvenient thing i found about our phone.
good thing is i can plug it in anywhere it has USB ports, including my car.
Click to expand...
Click to collapse
The SIZE matters... also in charging.
May be I am wrong, other in this forum are better than me in physic
but
1) The power usage when connected via activesync, having screen backlight 50%, Big HTC HOME is around 200/300 mA/h.
2) The battery is 2200 mA,
3)if you charge it with a 500 mA/h charger... 500-250=250 mA/h.... 9 ours to have a full 2200 mA charge,
Athena have also XSCALE CPU (clock increasing during heavvy usage) and the power usage could increase very quickly (I have seen some 1000 mA/h peak) due to heavvy memory and CPU usage, or microdrive access
Looking at DIVX movies, full screen, USB 1.0 connected... the power DECREASES (slowly)!

And I would like to add, that after several tests with different chargers, no doubt that using HTC chargers makes a big difference, specially the car charger.
In the case of car charger, using a normal one ( output 5V 500mA ) I made a trip of 300Km and the power level went down from 100% to 70% using TomTom.
And with the HTC charger ( 5V 2A ) leaving home with 50% and arriving the same destination with 100%, again using TomTom.
I'm assuming that using other GPS software the results will be equal.
I used car chargers with 500mA, 800mA and also 1A and I tought that the results should be different but in fact it seems to me that one thing is what the charger "says" and another thing is what can "give".
hope this helps.

poppey said:
.. it seems to me that one thing is what the charger "says" and another thing is what can "give".
hope this helps.
Click to expand...
Click to collapse
Yes, as I said it is a hard-wire issue

Yup, 2 pins need to be connected together before the Athena will go into "fast charge mode". You could hook up a 1000 amp bench power supply but still discharge your battery with GPS active - until you short the 2 pins. Don't remember which ones, its been discussed before on this board.

very insteresting...
yes i'm using the USB 500ma charger, just because past experiences has kind of though me that charging electronics with too much AMP it can burn it.
but it seems like the ATHENA can take that, since you have been using it.
I guess i'll shop around for a more powerful charger.
poppey said:
And I would like to add, that after several tests with different chargers, no doubt that using HTC chargers makes a big difference, specially the car charger.
In the case of car charger, using a normal one ( output 5V 500mA ) I made a trip of 300Km and the power level went down from 100% to 70% using TomTom.
And with the HTC charger ( 5V 2A ) leaving home with 50% and arriving the same destination with 100%, again using TomTom.
I'm assuming that using other GPS software the results will be equal.
I used car chargers with 500mA, 800mA and also 1A and I tought that the results should be different but in fact it seems to me that one thing is what the charger "says" and another thing is what can "give".
hope this helps.
Click to expand...
Click to collapse

AllGamer said:
charging electronics with too much AMP it can burn it.
Click to expand...
Click to collapse
Not true. Electronics is in many ways like the water system, with the water pressure equal to volts, and the gallons per minute equal to amps. However, there's one key difference - electronics will only use as much as its needs (and no more). Not like trying to get a drink from a high-pressure fire hose where you'll hurt yourself trying.
A 60 watt light bulb will only draw 60 watts and will not blow up even though it could draw many thousands of watts before the circuit breaker blew.

techntrek said:
Yup, 2 pins need to be connected together before the Athena will go into "fast charge mode". You could hook up a 1000 amp bench power supply but still discharge your battery with GPS active - until you short the 2 pins. Don't remember which ones, its been discussed before on this board.
Click to expand...
Click to collapse
This seems to do the trick with my Ameo.
http://www.expansys.com/d.aspx?i=154871

Question to those using a different charger with better battery life

I herd reports from person experiencing better battery life by using a non htc or factory charger. Some also say it takes much longer to charge but are now easily getting two days or longer life than with stock chargers. I want to narrow it down and compare the results.
I want to know what is the output mA. It is usually located on the charger it self where it states the voltage. The factory charger for the N1 is 980 mA and via usb is 480 mA. So those who are experiencing better battery life as a result of the switch, what is your mA on the charger? Also what brand is it?

I suspect this is right!
Whenever I use the stock charger, battery drops really fast, even if not using the phone much.
I'll be measuring this and put here the results.

Please do. I'm gonna try a bb charger tonight and see if it lasts longer.

I can't imagine this being the case. The battery holds a specific charge. I have a motorola charger, 500mA, and when you charge via computer USB you are getting less too. At no point have i had exceptional battery life.

I've used 2 different mains chargers, a car charger and charged from 2 seperate PC's using 2 seperate µUSB cables, battery life remains roughly the same, as you would expect.

I use my Nokia N97 charger rated 5v 1200 mA and it charges the phone from empty quite fast...sometimes from 20-30% i get to 100% in 2 hours flat...i get about 1-1.5 days and haven't tried the standard HTC charger yet cos I feel Nokia's are better quality...i even use the old Nokia usb cable but don't think usb cables make any difference.

Your Nokia adaptor will charge faster due to the extra 200mA available to the phone (assuming it's able to draw it, but given the faster charge you would assume so).

Electricity is electricity.
The only changes you'll see between sources is how fast it charges the battery.
There are no magic chargers that charge the battery a certain way to "last longer".

Higher current chargers get to the "mostly full" state quicker because they are dumping power into the battery faster. But, the protective electronics on Li-Ion batteries will cut to a "topping charge" state sooner because the charge speed is so high. The topping charge level is the same speed regardless of charger and so switching to it earlier means you spend longer in that state.
A lower current charger will take longer to get to the "mostly full" state, but it will get closer to true 100% before the electronics kick into the topping charge mode.
The other thing to consider is that the indicators on devices often indicate "charged" when the phone reaches the "mostly full" state and so the higher current chargers appear to "finish" faster. But, if you look at the charging status you will still see that it is still taking on a charge. If you wait until that stops then you will be at a true 100%.
So, if you need to get the phone to the "mostly full" state then a higher current charger is better for a quick boost. But, if you want to get the phone to a full charge then the current level of the charger may be mostly a wash due to the fact that it has to spend more time in the topping charge mode. If you are charging overnight then it really doesn't matter which you use.
Now, one thing that Li-Ion batteries do not like at all is heat. When you use a higher current charger then you heat the battery more and its eventual life (i.e. how many months/years it will last) will be impacted more than a lower current charger. So, for overnight charging I'd rather use a lower current charger. But, if you need to dump a lot of charge into the battery quickly then a higher current charger is faster if you aren't worried about getting it to the 100% full state. But, for small batteries like in phones, stay less than the rating of the batter (i.e. no higher than a 1400mA charger for a 1400mAH battery). Below that level there should be no appreciable harm to longevity, but even still - the lower the charge rate the better in the long run.
See this page for information on topping charge and charge currents:
http://batteryuniversity.com/partone-12.htm
See this page for graphs of battery longevity with different charge rates:
http://batteryuniversity.com/parttwo-34.htm

muncheese said:
There are no magic chargers that charge the battery a certain way to "last longer".
Click to expand...
Click to collapse
It is fuzzier than that.
A higher current charger will likely have the device report "I'm charged" with less power in the battery because what it really means is "I'm just doing a topping charge" and that topping charge can still be a good 10% or more of the battery life, especially higher with a stronger charger since the electronics have to be paranoid about over-charging and measuring the current changes that indicate the battery is truly full are harder when the charge rate is higher.
A lower current charger may not trigger the "I'm charged" indicators until it hits 95% full because it is pushing less on the trigger conditions.
If you have a habit of taking the phone off the charger when the indicator first goes green then you may see more battery life on the lower current charger, but it isn't magic - it's just the silly games that battery indicators play to impress the consumers.
Also, if you have a habit of taking it off the charger when it goes green then your battery may never get fully calibrated and so it may only be 70% full when it thinks it is full. But, a lower current charger may get you closer to full more often and thus cause you to reach a calibrated state easier and quicker.
For calibration you should always leave the phone on the charger until well after the light goes green, keeping it on even after the text indicator no longer indicates that any charge is happening (i.e. the lightning bolt is gone) and even then leave it on for a few hours past that anyway. Once calibrated then you have the maximum battery capacity available (modulo the "age" of the battery). It can take several hours to get a phone completely charged if it is poorly calibrated. And sometimes it may even get better with a couple of calibration cycles back to back (but only in extreme cases).
More info:
http://batteryuniversity.com/partone-12.htm

Two chargers used - one is a mains -> usb charger. (i.e allows USB lead to be used via a mains plug)
Output is 5v @ 1A
Other is a plantronics charger.
Output is [email protected] 350mA.
"Mains" based charger gives around a day's worth of charge with standard use.
The Plantronics gives me 2 days worth at standard use.
There is a fairly clear "boost" in battery life from switching between the two chargers.

Highland3r said:
Two chargers used - one is a mains -> usb charger. (i.e allows USB lead to be used via a mains plug)
Output is 5v @ 1A
Other is a plantronics charger.
Output is [email protected] 350mA.
"Mains" based charger gives around a day's worth of charge with standard use.
The Plantronics gives me 2 days worth at standard use.
There is a fairly clear "boost" in battery life from switching between the two chargers.
Click to expand...
Click to collapse
Well I just finish charing my N1 battery with a universal charger rated @ 200mA. It took over 4hours, I let it stay for 5. With my OEM charger I would get barely a day. So lets see how my battery lasts today.
flarbear said:
Higher current chargers get to the "mostly full" state quicker because they are dumping power into the battery faster. But, the protective electronics on Li-Ion batteries will cut to a "topping charge" state sooner because the charge speed is so high. The topping charge level is the same speed regardless of charger and so switching to it earlier means you spend longer in that state.
A lower current charger will take longer to get to the "mostly full" state, but it will get closer to true 100% before the electronics kick into the topping charge mode.
The other thing to consider is that the indicators on devices often indicate "charged" when the phone reaches the "mostly full" state and so the higher current chargers appear to "finish" faster. But, if you look at the charging status you will still see that it is still taking on a charge. If you wait until that stops then you will be at a true 100%.
So, if you need to get the phone to the "mostly full" state then a higher current charger is better for a quick boost. But, if you want to get the phone to a full charge then the current level of the charger may be mostly a wash due to the fact that it has to spend more time in the topping charge mode. If you are charging overnight then it really doesn't matter which you use.
Now, one thing that Li-Ion batteries do not like at all is heat. When you use a higher current charger then you heat the battery more and its eventual life (i.e. how many months/years it will last) will be impacted more than a lower current charger. So, for overnight charging I'd rather use a lower current charger. But, if you need to dump a lot of charge into the battery quickly then a higher current charger is faster if you aren't worried about getting it to the 100% full state. But, for small batteries like in phones, stay less than the rating of the batter (i.e. no higher than a 1400mA charger for a 1400mAH battery). Below that level there should be no appreciable harm to longevity, but even still - the lower the charge rate the better in the long run.
See this page for information on topping charge and charge currents:
http://batteryuniversity.com/partone-12.htm
See this page for graphs of battery longevity with different charge rates:
http://batteryuniversity.com/parttwo-34.htm
Click to expand...
Click to collapse
Great points indeed. I've learning alot and thanks for the links.

[SOLUTION] Slow Charging!

★★★This topic is for them who are having problems with stock charger and cable. If you don't have any problems, ignore this ★★★
Well, since I purchased my Note 2, I kept facing this slow charging problem. Now what is slow charging some of you will ask? Well, it's simple. The device is taking more than normal time for charging. Now how do you know the default/should be rate for charging? Simple again. The AC adapter clearly says output rate as 2000 mA or 2.0 A. So with that calculation Note 2's monstrous 3100 mAh should be fully charged with 2 hours. But as we've seen steady 2.0A is not the output case in some/many scenario, so add another 30 mins to it. So whatever it is, from 0-100%, the device shouldn't take more than 2 hours 30 minutes.
And for me, it was taking around 5 hours! Sometimes 4 hours 30 minutes, and if it's very fast then 4 hours. Well I was never gonna wait 4 damn hours before going to my office and irritate myself, and I don't have the habit of charging overnight, unless I absolutely need it.
So I kept calling my retailer, asked for replacement, and they did, well, you won't believe, they replaced three times actually, so I had three different Note 2, with three different charger. Well, each of them acted absolutely fine at first 3-4 charge, then the problem was back again and again. I in fact turned off the device and put it into trash once.
Then I thought let's try some different USB cables, I tried my friend's Galaxy Ace cable. Charging current kept fluctuating between 1000-1200 mA. Which was better than those faulty stock cables, which provided steady 900 mA. Sometimes it even was detecting the AC current as USB, which would provide a mere 460 mA and would take God knows how long! Then I found my piece. I went to my retailer, frustrated and angry, asked them to give me the thickest and shortest possible cable, and they provide me one from a Samsung phone's box, but I can't recall which device was that! And then I sat there for half an hour, kept plugging and unplugging, and the current rate was rock steady at 1800 mA. I took it, paid just 10$ and came back.
Since then I have charged my phone almost 10 times and the current rate never went below 1800 mA / 1.8 A.
This is the cable I am using, do notice that it has 5 pin set up against stock cable's 4 pi, if that matters in any way, and it's about 10% thicker than the stock cable and also about 9" shorter.
And how will you monitor the charging current, three ways are there,
1- Battery Monitor (yet I don't know how to exactly use it)
2- If you are rooted (which is a must anyway), then just go to, /sys/class/power_supply/battery/current_avg
3- Use the app from the link below. It basically reads the current value just exactly as above but it saves the time to go into that file every time. A big thanks to Deadvirus.
Galaxy Charging Current application's apk can be found here:
http://forum.xda-developers.com/showpost.php?p=36124435)?
Play Store link: (Paid)
https://play.google.com/store/apps/...S5hYm1hbnRpcy5nYWxheHljaGFyZ2luZ2N1cnJlbnQiXQ..
Thanks to this post and it's poster for informing us about the current output reading path,
http://forum.xda-developers.com/showpost.php?p=33585646&postcount=31

The included cable charger that mine came with charges fast like that, I let it charge slow with standard USB port overnight, but the included charger nd included cable should achieve this. The cable is important.

kebabs said:
The included cable charger that mine came with charges fast like that, I let it charge slow with standard USB port overnight, but the included charger nd included cable should achieve this. The cable is important.
Click to expand...
Click to collapse
Same here, it's done within about 2 hours every time, from ~1%. Something definitely must have gone wrong with yours :s

R: [SOLUTION] Slow Charging!
You are amazingly right. Every charger/cable combo I test seems to deliver different currents, according to the app you posted, ranging from 600 to 1300 (mA?).
Didn't know that could happen. Now I am looking for the Holy Grail of chargers, too.
After some tests: original chargers of Note 2 and Tab provide 1800 mA; no-brand Chinese labeled 1500 gives 1400; one Nokia labeled 1200 gives 1300, another, labeled 1200, gives 1200. Puro brand, labeled 2100, gives 1100. Another Chinese, no-brand, labeled 2000, double usb, gives 1100 per socket. Other no-brand samples give 600 or 300 mA.
Enormous variability.
Think I'll use the 1800 mA Samsung for when I'm out, and the good Nokia's for overnight charging when home.
Sent from my GT-N7100 using xda premium

And I ve been wondering why the heck original cable is too short. I thought samsung were just tight gits. Cable is mot even long enough to reach feom the wall to bed side table
Sent from my GT-N7100 using xda app-developers app

no problem whatsoever with mine , charging from 1 to 100 % in about 2 - 2:10 hours

Thank you for nice explanation! Now it's much clearer.
For me...
Stock charger + stock short cable (0,9 m) = ~2+ hours
Stock charger + some other cable (1,8 m) = ~4+ hours
,don't know about thicknes. Mb stock cable is thicker, or at least harder to bend.
Sent from my GT-N7100

Thanks for the APK, I found a huge variance in charging rates based on a combination of chargers and cables. Goes to show that the cable makes a huge difference. Here's my findings:
** Stock Charger (2A):
w/Stock Cable (4-pin) - 1698
w/Cable from another phone (5-pin) - 1698
w/Cable from battery pack (5-pin)- 1698
w/generic eBay cable (4-pin)- 100! - It didn't charge at all, even with screen off.
** iPhone Charger (1A):
w/Stock Cable (4-pin) - 1300
w/Cable from another phone (5-pin) - 1100
w/Cable from battery pack (5-pin) - 1300
w/generic eBay cable (4-pin) - 100!
** Car Charger (1A):
w/another generic eBay cable - 490
(Was running Redpill kernel, not sure if that has fast charging built in which might affect results).

The app is really helpful. Been wondering what the charging current was on different chargers.
I measured it using the app based on current AVG and not current NOW. This is because I used a 800ma blackberry charger and yet current now shows 1698 which is impossible.
The app will tell you which cables and chargers are good. I was shocked that out of my 8 cables only 3 gave an average of more than 1000, the rest give around 800 or less.
Sent from my GT-N7100 using Tapatalk 2

Hi!
So, the AC adaptater mentionne 2A but it doesn't mean that your devuce consume 2A... It means that the AC adaptater can provide 2A under 5V.
If a load need to consume 500mA the adaptater can provide enough power. But if it needs more than 2A, the ouput current will be at the 2A max but your voltage will decrease (it means that you have a device problem!).
The only thing to do is to refer to the user manual of device.
One thing more, the USB protocole fix the maximun current to 1A!
An other thing, if you want to have a better battery life it recommended to charge your battery slowly. Just have the habit to charge it during the night.
See ya.
Sent from my GT-N7105 using xda app-developers app

I also got an lg very thick cable..which is also 5 pin and let me tell it charges REEEEAAAALLLLYYYY FAST..when seen in application posted in op(thanx) it shows 1800..but the problem is if I detach charging before battery full notification then the battery is consumed at very high rate..I.e battery life decreased or maybe shows fake battery percentage. .and if I go for full charge it takes half hour more after 100% to show battery full in notification. .
Sent from my GT-N7100 using Tapatalk 2

lucier said:
Hi!
So, the AC adaptater mentionne 2A but it doesn't mean that your devuce consume 2A... It means that the AC adaptater can provide 2A under 5V.
If a load need to consume 500mA the adaptater can provide enough power. But if it needs more than 2A, the ouput current will be at the 2A max but your voltage will decrease (it means that you have a device problem!).
The only thing to do is to refer to the user manual of device.
One thing more, the USB protocole fix the maximun current to 1A!
An other thing, if you want to have a better battery life it recommended to charge your battery slowly. Just have the habit to charge it during the night.
See ya.
Sent from my GT-N7105 using xda app-developers app
Click to expand...
Click to collapse
Yes, the stock charger doesn't provide full 2A current.
And is it true that if the device is charged slowly the battery backup will be better? I mean that would be good then. I'll try that, thanks for informing.
sumeshd said:
I also got an lg very thick cable..which is also 5 pin and let me tell it charges REEEEAAAALLLLYYYY FAST..when seen in application posted in op(thanx) it shows 1800..but the problem is if I detach charging before battery full notification then the battery is consumed at very high rate..I.e battery life decreased or maybe shows fake battery percentage. .and if I go for full charge it takes half hour more after 100% to show battery full in notification. .
Sent from my GT-N7100 using Tapatalk 2
Click to expand...
Click to collapse
On my old cable, the damaged stock one, it'd take half an hour to reach 100% from 99. With this one it takes 5-6 mins.
This whole charging process is complicated that much I can say.
'Swyped' from my GT-N7100

Unfortunately I got a grey import so my stock charger was for a different country.
I'm having to use a 1.0A charger instead.
It still only takes a few hours to charge though. I sleep for 4-5 hours and it's always fully charged when I wake up.
Sent from my GT-N7100 using xda app-developers app

Hmm is this a accurate way of measuring amp?
I was using same cord and the apk provided above, using the default 2amp charger says 1697 and using a bellkin in charger rated at 1amp,says the same thing?
Hmm

I am a bit confused, which of the following is my actual charging rate? The charge is really slow, around 15% per hour or so.
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.

As I stated in the screenshot, you shouldn't look at current_now, it'll always be same, 1698, you should look at current_avg.
'Swyped' from my GT-N7100

Damn. That means it's time for me to get a new charger, isn't it?
Just switched to a very old 0.7 A output charger my father uses on his primitive samsung device. It gives better results than my stock charger/USB cable, provided by samsung. 800 mA on a 700 mA charger. How is that even possible?
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.

SacGuru said:
I am a bit confused, which of the following is my actual charging rate? The charge is really slow, around 15% per hour or so.
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.
Click to expand...
Click to collapse
are using stock cable ?

yahyoh said:
are using stock cable ?
Click to expand...
Click to collapse
Yeah I am. The stock charger says 2A, 5V. When used with the stock cable it charges at a mere 200-400 mA. I used the wall charger of an old samsung phone (doesn't have a usb cable, just a wall charger) and current rises to 800mA. Where can I buy a good USB cable at in the UK?
Sent from my GT-N7100.
Those who help noobs go to heaven. True story.

I have buy a new stock charger because I was thinking my stock one was dead (slow charging / usb mode)...
But in fact it's not my stock charger who is defected but it's just the cable!!!
Just try with another cable and it's OK (AC mode).
Thanks for the apk!

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.
Click to expand...
Click to collapse
Really? [emoji15][emoji41][emoji56]

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

Did u ever get this sorted

Battery Discharging while plugged in

Hi,
I was video calling someone for a group project, and I was using a regular (not turbo) charger to charge my phone while i was at it. when I started, my phone was at 5%. Then it went to 0% and died, even though the charger was still plugged in. Is there any way to stop it from losing charge while its plugged in like this?

Use a faster charger. 5V 1A is fine to charge it when not in use but if you use it intensively like you did (screen on and high network usage) it is not enough. I would use at minimum a 5V 2A or the turbo charger.

DekkerP6 said:
Use a faster charger. 5V 1A is fine to charge it when not in use but if you use it intensively like you did (screen on and high network usage) it is not enough. I would use at minimum a 5V 2A or the turbo charger.
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You are mostly right, but the phone will not draw in excess of about 1200mA from any non-turbo charger, a larger charger is not important and will give no gain, but it doesn't hurt anything either.
The Moto X has a very large current draw off the battery when using the display actively, and at high brightness it gets almost ridiculously high, and add in intensive networking, high CPU usage (encode/decode video streams in real-time), and the power draw can easily exceed 1A or even more, so I am not surprised the battery drained while connected.
I am not an advocate of Turbo charging either, Qualcomm Quick Charge 2.0 can be hard on batteries, not in itself but the heat build up while using the device and turbo charging at the same time can easily exceed acceptable thresholds, but sometimes it is necessary with this device.

acejavelin said:
You are mostly right, but the phone will not draw in excess of about 1200mA from any non-turbo charger, a larger charger is not important and will give no gain, but it doesn't hurt anything either.
The Moto X has a very large current draw off the battery when using the display actively, and at high brightness it gets almost ridiculously high, and add in intensive networking, high CPU usage (encode/decode video streams in real-time), and the power draw can easily exceed 1A or even more, so I am not surprised the battery drained while connected.
I am not an advocate of Turbo charging either, Qualcomm Quick Charge 2.0 can be hard on batteries, not in itself but the heat build up while using the device and turbo charging at the same time can easily exceed acceptable thresholds, but sometimes it is necessary with this device.
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I remember reading that quick charge is deactivated when the screen is on (reverting back to 5V) to avoid overheating so I don't see using the turbocharger when using the phone as worst than any other charger or any better for that matter.
But yes, he shouldn't have started his chat with a MXPE at 5% battery left .

DekkerP6 said:
I remember reading that quick charge is deactivated when the screen is on (reverting back to 5V) to avoid overheating so I don't see using the turbocharger when using the phone as worst than any other charger or any better for that matter.
But yes, he shouldn't have started his chat with a MXPE at 5% battery left .
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Hmm... I hadn't heard that but it makes perfect sense. Personally, I am usually looking for a charger if my phone falls under 40% unless it's within a few hours of bed time.