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For some reason, every couple of days when I plug my phone in to charge the battery overnight I end up getting an alert (about 4 in the morning!) to change the battery because mine is dead, along with the back up battery, and then the phone shuts off within about a minute. Luckily I have another battery, which I then put in, and then put the dead battery in the "back up battery" slot in the cradle to charge, which it does. I don't know why this happens but it is very frustrating. I am afraid of this happening on a trip out of town where I won't have the ability to use my cradle, unless I bring it which is a big hassle. I don't know what to do.
This IS vexing. By the fact that it charges the extra battery - we know that the power transformer is connected. Since the device does not seem to be charging (possibly even discharging?) - it seems that either the connector on the charging base or the connector on the device itself are bad.
Have you used the power dongle connected to the power transformer to attempt to charge the device? This would tell you if it's the charging base or the device. If it charges outside of the base, it's the base - if not, it's the device.
Best of luck!
How are you charging the battery - from mains power or through the USB?
I had a situation where I was only using USB power to the cradle and although this worked most of the time, I noticed that if the battery was already low (<50%) then the battery seemed to discharge rather than charge.
So the trigger in your case may be the amount of charge left in the battery before you start re-charging it.
I think other people have reported similar discharging situations, so some other ideas might emerge from a search of other threads.
Well the title sais it all.
Mine take 4,5 to 5 hours to be fully charged from FULLY empty (I wait till the phone switches off i.e. Battery level = 0%).
I find that toooooooo long
Is it just mine or do your HDs take so long as well?
I must add I'm charging the phone via normal electrical power not via USB to PC.
I believe it may not be advisable to fully drain your battery all the time to charge it. We are all using lithium battery these days and not nickel cadmium battery. Hence, there's no issue of discharging the battery prior to the charging.
A new battery will take slightly longer to be charged to reach its full potential and capacity.
If it's taking that long, you may want to check whether you're on the right voltage settings of your charger.
I just let it fully drain twice (I still belong to the old school of fully discharging and recharging your batterya couple of times in the beginning).
Voltage settings are fine.
For example if i leave all night charging, does it damage the battery? Some batteries after fullycharged, they wont charge anymore. What about u8800?
And what happens if i charge while phone is open and not fully empty? Does it damage?
My charge lasts 16 hours, why is it? I dont use wifi, games, etc. Please help
All ROMs should stop the charging process when reached 100% (the icon changes, on the stock ROM the flash disappears of the icon), therefore I believe that the battery cannot be damaged by leaving the phone plugged in the whole night.
I'm sure that it doesn't matter when you recharge the phone, if it's 10% or 50% it makes no difference to the charging process or the battery. It use to matter on the Li-Nch batteries, but those are long gone...
The fact that the battery only lasts 16 hours, it's an unrelated problem, that I've been struggling with for months now...It's one of the system/hardware components that hangs and doesn't allow the phone to go to sleep...therefore, the battery lasts up to 24h.
Look at this thread, so many users are affected by this...probably most of them and only the recent kernels (.void/Miui) have measures against this problem.http://forum.xda-developers.com/showthread.php?t=1043760
I did not make any rom differences or overclock. Still stops the charging?
Sometimes i charge from pc via usb, can it damage?
It goes 16 hours without wifi or blueetooth or 3g. I dont use too much but goes for 16 hours.
http://forum.xda-developers.com/showthread.php?t=1043760
Here, it is about sleeping mode. My phone goes black screen after 15 seconds idle. What is sleeping mode?
Cursed Chico said:
I did not make any rom differences or overclock. Still stops the charging?
Sometimes i charge from pc via usb, can it damage?
It goes 16 hours without wifi or blueetooth or 3g. I dont use too much but goes for 16 hours.
http://forum.xda-developers.com/showthread.php?t=1043760
Here, it is about sleeping mode. My phone goes black screen after 15 seconds idle. What is sleeping mode?
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Charging from USB is somewhat preferable to wall charger, due to it charging slower, therefore generating less heat. Although, a wall charger won't do any harm. When the screen is off and the phone is not doing anything, the CPU is suppose to go into a deep sleep state, yet with this phone it does not.
wall charging should be preferable in my experience
Ok, let me clarify a few things here.
The battery recharging process is simple, when the battery reaches 2.2V, then the current inside is not enough to sustain the hardware and it's considered empty. Any standard phone charger, will pump current until the voltage is 4.3 and then the so called "negative delta v" signal is being sent and the charger stops pumping.
USB is a BUS designed to carry data, but to be able to carry data it needs to provide a power supply to the connected device. Therefore, any USB should be able to deliver 5V and 500mA to any device connected.
As this phone's battery, according to the wall charger specification, takes up to 1Amp, the simple math tells us that the wall charger will charge the battery twice as fast. Since I've been dealing with batteries, I can tell you that in this case USB charger is a much better choice to recharge this battery, as it delivers only 500mA. The less current going through the electrodes, the lower the chance of damaging the battery due to high temperature.
For more info:
http://www.mpoweruk.com/chargers.htm
http://en.wikipedia.org/wiki/Battery_charger
http://en.wikipedia.org/wiki/Lithium-ion_battery
According to Wikipedia:
"Most modern cell phones, laptops, and most electric vehicles use Lithium-ion batteries. These batteries last longest if the battery is frequently charged; fully discharging them will degrade their capacity relatively quickly.[23] When storing however, lithium batteries degrade more while fully charged than if they are only 40% charged. Degradation also occurs faster at higher temperatures. Degradation in lithium-ion batteries is caused by an increased internal battery resistance due to cell oxidation. This decreases the efficiency of the battery, resulting in less net current available to be drawn from the battery."
These batteries last longest if the battery is frequently charged; fully discharging them will degrade their capacity relatively quickly.
So we must usually charge from usb and must stop before reaching %100 charge, maybe %98?
But when connect to pc, there is an icon shown, before disconnecting we need to click "disconnect secure" icon on system tray, if i dont do, it damages the system of phone?
Cursed Chico said:
But when connect to pc, there is an icon shown, before disconnecting we need to click "disconnect secure" icon on system tray, if i dont do, it damages the system of phone?
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There is a very small chance on XP, dunno about vista, no harm on win7.
So we should usually charge from usb and must stop before reaching %100 charge, maybe %98?
It is more safe since there is half of the current that passes compered to Charging with the AC adapter. But it theoretically takes almost double time.
Cursed Chico said:
So we should usually charge from usb and must stop before reaching %100 charge, maybe %98?
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Yes, that's correct. But, I wouldn't worry about stopping before 100%. I know for sure that the stock ROMs are stopping the charging process when reached 100%.
Cursed Chico said:
But when connect to pc, there is an icon shown, before disconnecting we need to click "disconnect secure" icon on system tray, if i dont do, it damages the system of phone?
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No.You're not going to damage anything by disconnecting the cable directly. That "safe disconnect" is only for data transfer, nothing to do with charging.
Because of the exploding nature of li-ion cells when misused, the battery itself has a protection circuit to prevent overcharge and discharge. So whatever how much the rom wants to charge, the battery will protect itself...
Exactly; the ROM does not have any influence on the charging process - that is why your phone can charge the battery even though it is turned off. The whole process is completely independent from the software your phone is running.
In 2011 it is very hard to damage a battery, it will most likely die from old age. There is just one thing that is not the best thing to do: Trying to switch on the phone when the battery is empty already. If the voltage of the battery drops below a certain point, the battery might be damaged and thus have less capacity afterwards.
To be on the safe side I always turn off the phone a few minutes before the battery is completely empty.
I agree that there is a separate circuit that does the charging, so no matter if the phone is on or off, battery would still charge. But, I believe that the Rom can interfere with the charging process, that's why on some Roms you get the flashing buttons when phone is fully charged or sometimes you can't unlock the phone from the first attempt, when battery is full.
In reality, i believe that charging process has 2 control points, the default (when phone is switched on) and the "failsafe" one that charges the phone when voltage has dropped below a certain value (which has to be is different in terms of current values, as there is no power consumption).
Hi all.. My Evo Shift 4G seems to have developed a charging issue.. I'm not sure if the phone is not reading the voltage from the battery properly or what.. Basically, my phone will not charge over 85%... In other words -- it never reaches 90%+ on the phone, which would typically cause the charging indicator to change from amber to green.
I've watched what the phone supposedly sees with 'Battery Monitor Widget'. Currently, the phone has been on the AC charger for about 7 hours... The phone reports 77% charged, 32.1 degrees C for the battery, 4024mV. I've watched it during the charge cycles, and when the battery is low, the current is definitely being applied to the battery -- around 500-600 mA. When it gets close to 70%, however, it starts ramping down the current.. Right now, at that 77% level, it is showing 0mA being applied to the charging circuit.
I have 3 batteries -- two HTC original batteries, one about 2 weeks old, the other from March.. I also have a 3rd party battery.. All of the batteries behave the same in MY phone.. If I throw the batteries into a couple of friend's HTC phones (one has a Hero, the other a MyTouch 4G) -- their phones report the charge at 100%.
I also have an external charger -- if I charge the batteries in that fully, my phone shows 85% charge, while my friend's phones will show the batteries at 100%. Likewise, if I put their batteries in my phone once theirs are fully charged, my phone will show it at 85%.
Anyone know how or if I can correct this?
Thanks,
Rick
Have you tried clearing the battery stats and re-calibrating?
Ron Overdrive said:
Have you tried clearing the battery stats and re-calibrating?
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I would suggest you do that.
Your phone would have to be rooted though.
Evo SHIFT
Enraged21 said:
I would suggest you do that.
Your phone would have to be rooted though.
Evo SHIFT
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It is rooted.. I get the same behavior on CM7 or the rooted OTA 2.3 update by x99..
I've tried clearing the battery stats.. That has not worked.. I believe it comes down to a problem with how my phone is reading the voltage of the battery..
Worked for me...
I had the same problem but the it could charge to 93ish% percent, not 85. I fixed by clearing the battery stats, setting the screen to never go off, and left it on overnight (while I'd been using it all day), recharged it to full while it was off the next morning, and unplugged the charger and reinserted it until when I could plug it in starting with the light green. Following, I turned it on while it was still plugged in, downloaded the battery calibration app from the market, and calibrated it.
Afterwards, I've been able to get the same outrageous battery life that others claimed they got on roms like evervolv and miui, and been able to charge to full. See if this works for you.
Have you tried a different charger? Say if you are using the wall try a usb or if using a usb try a wall. Just a suggestion don't know if it'll work.
EDIT: Looks like I need to follow my own rules and read everything fully. Sorry for the ignorant post it'll prob be no help!
FdxRider said:
Have you tried a different charger? Say if you are using the wall try a usb or if using a usb try a wall. Just a suggestion don't know if it'll work.
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I've tried charging via a number of different chargers:
1) HTC AC Charger (5V/1A)
2) Computer USB (5V 500mA)
3) Palm Pre AC Charger (5V/1A)
4) Palm Pre Car Charger (5V/1A)
5) Aftermarket AC Charger (5V/1A)
I think there may be a problem with CWM. I tired the wipe battery stats a few times (7) and it seems like it didn't do anything. Then I downloaded an app from the market called battery calibration, wiped with the app. I think it actually worked with the app, as my run times went from about 8-9hrs to well over 24. Hope this helps - Viperspike
From what i understand, charge to 100%, turn phone off and charge a little more, reboot, wipe batt stats and unplug. Run all the way down to zero (phone shutdown) and restart one more time (it should immediately turn off) Then plug in the charger, and reboot. Once on the charger make sure it charges uninterrupted until it reaches 100% the first charge.
Thats the problem.. I can never get anywhere near 100% -- 85% is the top.. At that point current drops to 0mA and the charging circuit turns off.
I did send a support request to HTC.. This is their response:
You were having issues with the battery life on your HTC EVO Shift 4G. You mention that you have tried another battery but you cannot get the LED indicator light to turn green or the charge percentage to go above 85%. You state that you have tested your two batteries in a friend’s MyTouch 4G and HTC Hero. Both devices show 100% when there is an indication of a full charge. Unfortunately, there might be another hardware related issue causing this to occur so I would suggest you consider a repair request for your Android device.
I left my phone charging overnight via the wall charger. Battery registered at 1% when I started the charge.
When I woke up this morning I had a large low battery icon on the screen and the phone won't turn on. I disconnected the charge, tried charging with another charger but everytime it shows the SAMSUNG logo, then the large low battery icon.
I tried removing the battery, cleaning the charger port terminals, swapped out different USB cords, everything but a hard reset.
No matter what I do the phone will not start up.
Has anyone experienced this before, or possibly no how to resolve it?
mfarlow said:
I left my phone charging overnight via the wall charger. Battery registered at 1% when I started the charge.
When I woke up this morning I had a large low battery icon on the screen and the phone won't turn on. I disconnected the charge, tried charging with another charger but everytime it shows the SAMSUNG logo, then the large low battery icon.
I tried removing the battery, cleaning the charger port terminals, swapped out different USB cords, everything but a hard reset.
No matter what I do the phone will not start up.
Has anyone experienced this before, or possibly no how to resolve it?
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Happened to me several times (on both my focuses Rogers and AT&T), and I came to the conclusion it's a bug somewhere in the phone or the battery. I'm not sure exactly where the problem is (software, hardware) but I can tell you how I fixed it.
What happens is, the battery is almost depleted, it actually is 1%. The phone incorrectly reads that thinks it's charged fully and doesn't allow further charging the battery. So, you're not able to charge the battery correctly.
Now, as I previously stated in some other posts, I recommend having a standalone charger (Samsung i9000 ones are compatible are very cheap) as well as a secondary battery. The depleted battery gets charged fine in the standalone charger and when it passes 5% charge, it can be charged fine (again) in the phone.
This doesn't happen often, I believe it happened 5 times in more than 300 charging cycles (2 phones x 150 charges, I have them for over a year) so it's not that common.
I also found that it *may* work if you charge the battery in another phone.
As a general thumb rule, it's important not to leave the battery to completely discharge, and connect the charger/usb when it reaches about 40% (when you can, ofc). Please refer to my post here to see how you can preserve battery life.