Help Battery Charge Issue

[pm5544]

I was just charging my phone just now, and thought to go check how far it had gone with the charge, when I looked it said 90% then seconds later it changed to show 100% full. Why would this be as it is a new battery, well I have had it for about 3 weeks now.

Does this indicate an issue somewhere and would it also be the reason why it drops so quick from 100% to 93% in such a short space of time?

 

[Rukbat]

It could be. LiIon batteries are funny beasts, they can develop weird problems. Bring the phone to the carrier's store (hope they have a good tech support staff) and ask them to life test the battery, telling them about the problem you're having. It might also help if you charge the battery to 100%, then reboot the phone and leave it sitting doing nothing until it tells you to reconnect the charger, noting how long that takes. (They'll know about how long it should take with that phone.) If they're really good they'll just give you a new battery - it's cheaper for them than actually running a few hours of checks on the phone.

In the future, with any new battery, keep the phone off. Charge the battery until it's 100% charged. Disconnect the charger and use the phone normally until it tells you to connect the charger. Do that 3 times. After that you can use and charge it however you need to. I have a few phones that are about 10 years old, still have the factory original battery and, aside from the fact that you can't use phones without GPS any more, they still hold a full charge and still work. (I've given plenty of them away to poor people who need some way to call 911, but can't afford even a cheap phone.)

 

[pm5544]

Thanks for your reply.

Here is something I want to add.

After it had gone to 100% straight from 90% I then decided to charge it again to 100%, this was when it showed as 98% remaining, and have noticed that the percentage goes down from the 100% to 99, 98, 97 etc, so I find it weird that it didn't show anything from 91% to 99% when charging, and yet when it is discharging it does show.

It appears that as soon as this battery hits 90% the system thinks it's fully charged and will report it as such, therefore it jumps from 90% to 100%. Is this normal though?

 

[pm5544]

I have tried again with a completely new Samsung battery with the same mAh1500, and it seems to have the same issue with going from 93% straight to 100%.

Is it normal that when you have the phone switched off completely while charging, and once it shows full battery charge, if it's left like this for say 15mins or so, when I turn the phone back on it will say 91%, should the percentage of charge go down even though the charger is still connected but phone completely turned off?

I would like to add something else that I have noticed, and that is when the phone is ON the % goes down in a normal fashion, but when the screen is in sleep mode it acts weird, in that it was going down from 100% slowly to 97%, then I put the phone in idle mode, left it a few seconds, put screen back on from idle and the % showed 95, this can't be normal surely?

 

[pm5544]

May I ask how long your phone takes to charge, like what percentage is it at when you put it on to charge and how long does it take to reach 100% ?

One thing I don't like about JellyBean is that it doesn't alert you with a sound once it's fully charged unlike Gingerbread however it does alert when it needs charged, is yours the same with all of this?

 

[milesbennetdyson]

I haven't really noticed any problems like that, although I think it sometimes drops from around 30-something to 15%. I'll try and keep an eye on that.

And yeah, it doesn't make a sound when it's fully charged. I'm sure that's only happened in the last few weeks though, I upgraded to JB ages before that.

 

[pm5544]

That's interesting as my fully charged alert sound stopped straight away as soon as I had upgraded to Jellybean months ago.

 

[pm5544]

When I charge my battery now I see it going to 100% but the status bar notification doesn't report it's totally full till say 5 or more minutes later. In other words it says 100% Charging and eventually will show as Battery Full.

When I see it as 100% still charging should I unplug the charger without waiting on the battery full unplug charger message?

I get the feeling that as soon as the phone reports 100% and if I don't remove the charger the battery in some way will be losing it's power like discharging.

 

[pm5544]

I am now starting to unplug the charger as soon as the phone gets to 100% and before it brings up the confirmation to unplug the charger, as this confirmation can be up to five mins later and I get the feeling that before the unplug message appears the battery is actually discharging as soon as it reaches 100%, so in essence if it takes say approx five mins for the unplug message then I don't see the point of leaving the charger connected just to wait for the confirmation notification message to appear when it could actually be discharging at that time.

I am sure in most other phones the unplug charger message appears as soon as the phone reaches 100% and no later.