Why does the battery take longer to charge while the phone is off?? the funny thing is i think it lasts longer when i charge while the phone is off, am i being paranoic?
I have noticed that it charges slower when turned off, but personally i see more battery life when i charge the phone when it is on.
Not in my case...It appears to be faster....
Charge via USB and it is slow.
Charge via wall outlet is extremely quick.
The phone trickle charges during the last 10 percent to ensure a real full charge. But it shouldn't matter if the phone is on or off.
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I got a Nexus S the other day and so far impressed apart from one thing. I left the phone on charge overnight and in the morning it said it was only 96% charged. This was with it plugged into the mains charger for almost 8 hours with the phone on stand-by.
So I read on a thread somewhere you need to discharge the battery fully, then charge the phone with it turned off to correct this. So I did that last night and again this morning it says it's only 96% charged.
I'm also disappointed at how slowly it charges via the USB cable. Had it plugged in for a couple hours at work on my computer and it only went up by around 3%, this is shocking. I'm trying it again now on a different computer and so far it's only gone up 1% in an hour.
What is going on?
It's meant to stop at 95% - 96%
Leaving your battery at high voltage (100%) will cost the battery lifespan to shorten in the long run. So usually chargers do not charge it to 100% at all but slightly below it to lengthen battery life.
OK thanks for your quick response.
Regarding it being slow to charge connected to a computer, is that normal?
Are you leaving your screen on while charging? Because the screen eat alot of power, so that might be the case.
navlem said:
Are you leaving your screen on while charging? Because the screen eat alot of power, so that might be the case.
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Nope, it turns off after 30 seconds. Wifi was also turned off.
Maybe try using SetCPU to alter your processor speed during charging and screen off to the lowest. It will significantly increase your charging speed.
navlem said:
Maybe try using SetCPU to alter your processor speed during charging and screen off to the lowest. It will significantly increase your charging speed.
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I will give that a go. But really should this be something that I have to do, shouldn't the phone charge on it's default settings via USB at a decent rate?
It might be due to programs running at the background. I'm not sure. But my Nexus S charges fast enough though. Not as slow as you mention. Maybe try doing a charge after a reboot of your phone? If it charges faster after the reboot, it is most likely the background processes you had.
Red Arrow said:
OK thanks for your quick response.
Regarding it being slow to charge connected to a computer, is that normal?
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Yes it is. USB only supplies 500mA. Plugging into the wall is usually 700mA or 1A. Have you ever seen how long it takes to charge an iPad on USB? Its wall charger is 2A.
Sent from my Nexus S using Tapatalk
Red Arrow said:
I will give that a go. But really should this be something that I have to do, shouldn't the phone charge on it's default settings via USB at a decent rate?
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No because usb is only half power of regular wall charger, so it takes much longer to charge on usb. It's possible when using the phone during usb charging to pull more power than usb can provide, stopping the charge completely.
Red Arrow said:
I got a Nexus S the other day and so far impressed apart from one thing. I left the phone on charge overnight and in the morning it said it was only 96% charged. This was with it plugged into the mains charger for almost 8 hours with the phone on stand-by.
So I read on a thread somewhere you need to discharge the battery fully, then charge the phone with it turned off to correct this. So I did that last night and again this morning it says it's only 96% charged.
I'm also disappointed at how slowly it charges via the USB cable. Had it plugged in for a couple hours at work on my computer and it only went up by around 3%, this is shocking. I'm trying it again now on a different computer and so far it's only gone up 1% in an hour.
What is going on?
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I also have this problems, but if don't use the computer usb to charge, it seems no problem.
Is it me or is anyone else getting a slow recharge of their battery. I turned the phone off for an hour and the charge only went up a couple percent
agentscuba314 said:
Is it me or is anyone else getting a slow recharge of their battery. I turned the phone off for an hour and the charge only went up a couple percent
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What did you have it plugged into? If it was a computer or charger meant for a lower powered device (like a Bluetooth) that might explain it.
My G2x charges faster than any phone I can remember.
I went from ~20% to 100% in 1.5 hours yesterday, phone on but idle and with the charger it came with. I would try the software reset (settings>privacy>factory data reset) or hardware reset (power off, then hold home and volume down as you power on) and see if those help.
agentscuba314 said:
Is it me or is anyone else getting a slow recharge of their battery. I turned the phone off for an hour and the charge only went up a couple percent
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I had it plugged into a wall outlet with a strictly wall charger. I know the chargers that sub as a usb and charger, recharge the phone at a slower rate
Mine recharges from sub - 20% to 100% in about two hours on stock charger in a wall outlet.
Sent from my LG-P999 using XDA App
UCFJake said:
Mine recharges from sub - 20% to 100% in about two hours on stock charger in a wall outlet.
Sent from my LG-P999 using XDA App
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That's about what I get, but that still feels long to me. I could charge my N1 in an 70 minutes.
UCFJake said:
Mine recharges from sub - 20% to 100% in about two hours on stock charger in a wall outlet.
Sent from my LG-P999 using XDA App
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Same results here.
If you can disconnect the data connection of the microUSB cable, do it. This will help to speed up the charging.
OK, so I went ahead and did a factory reset and I will let you know what I get.
I'm getting a slow charge rate to..when i put cm7 on it it wouldn't charge at all for some reason, then after that w/ other roms it would overheat and charge crazy slow, like 1 percent every 5 min, idk maybe i'm inpatience or don't remember how fast it's suppose to be, i need to use juiceplotter and see how fast or slow it charges....i might do a warranty replacement......idk yet......
I am getting a fast charge rate. The fastest I've ever got with a stock charger. Now when I charge it with a Logitech charger for my wireless mouse it is insanely fast. I'm talking going from 15% to 100% in a matter of 30 minutes. Anyone know if this is bad for the battery?
When I charge my phone via wall charger, it charges much faster and I get better battery life. When I charge it via USB, the battery drains much faster over the day. Is that normal?
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Not sure in this. I know that charging via wall is faster as it has direct power current and it closes the data line. Maybe you were having wake lock issues and it wasnt going to deep sleep properly? I charge a lot via USB since I'm on my PC a lot but had no large battery drain. On a regular idle I get about 1%/hr and that's with no underclocking.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
If you charge it through usb try restarting after its full and after you unplugged it and let us know if it still drains faster.
And for reference: http://forum.xda-developers.com/showthread.php?t=1759541
Yesterday after having the tablet full charged I noticed that the battery was draining pretty quickly. Now after having it charging all night with the power off, w/ the charge light on, I powered it up to See that it only had 7 %charged. Now with it on and charging the level stays about the same if no goes down. Now I the charger is a bit temperamental but this is bad. Could the battery be bad organ I reset the battery memory in recovery?
please check your charger current mark. and you can charged xoom by pc usb port.
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No, the USB doesn't charge the Xoom. Only the Family edition and Xoom 2, from what I understand can be charged via USB.
I've found that the tablet will show the battery icon as charging but when powering off wiith Quick Boot and not touching the cord the charge light is not on.
I love this tablet but I'm beginning to feel that after my Verizon contract runs out it may be time to move on. It's quite a shame.
For the past 3 months my tablet has been struggling to charge.
I would plug it in, it would show the charging icon on the battery, but it won't charge. Sometimes it will INCREDIBLY slowly. Other times (most of the time) the charging percentage will decrease while its plugged into a charged.
I have tried:
1.Soft reset
2.Hard reset
3.Removing micro sd card
4.Different (original) lead
5.Different (original charger (3 in total)
6.Opening it up and disconnecting the battery terminal for 5 mins
7.Holding down power while battery disconnected
8.Connecting the charger FIRST before connecting the other end to the mains.
Im getting nowhere. Currently its on 1% and just wont charge.
To me it could be the charging port or the battery. How do i determine (without spending heaps on a battery) what to replace first?. Is there anyone else with this problem?.
Thanks
Just now i plugged it in charge. The tablet is off as its on 0%. It took 30 mins to get to 4%, then it went back down to 0% instantly.
But like i say, when it DOES have a charge, the charge is usually decreasing as the charger is plugged in, till it reaches 0%!. Only sometimes very randomly and very rarely will it actually charge properly, and when it does it operates perfectly with it OFF the charger. So it doesn't drain dramatically off the charger.
Right now im struggling to even get a charge out of it now.
Can someone help? charging port or battery fault??
J4G3D said:
Just now i plugged it in charge. The tablet is off as its on 0%. It took 30 mins to get to 4%, then it went back down to 0% instantly.
But like i say, when it DOES have a charge, the charge is usually decreasing as the charger is plugged in, till it reaches 0%!. Only sometimes very randomly and very rarely will it actually charge properly, and when it does it operates perfectly with it OFF the charger. So it doesn't drain dramatically off the charger.
Right now im struggling to even get a charge out of it now.
Can someone help? charging port or battery fault??
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I'd say it's the battery.
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Droidriven said:
I'd say it's the battery.
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Its on 30% now, creeping up slowly. So strange.
Have you seen any other cases the same to say it is the battery?
J4G3D said:
Its on 30% now, creeping up slowly. So strange.
Have you seen any other cases the same to say it is the battery?
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When a device charges strangely fast or agonizingly slow, it's typically the battery, also, randomly discharging fast is also a sign.
You could always have a repair take a look with a voltmeter, testing the battery and the USB port/charging components. Or you could do it yourself.
Sometimes it's just the solder working loose on some of the pins from your USB port, you can do a reflow on those solder points.
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