Help (Solved) Precedent Battery Problem

[androidfear93]

I have just recently purchased the precedent and it has been fine until recently. When I reboot the phone sometimes my battery percentage decreases by about 8-10%, this happens mostly right after its done charging. I'm about to go get the optimus q but I wanted to see if anybody could help me before I go and replace it. (EDIT) Solved: I dont even have the phone anymore.

 

[PolicyWonk]

There probably is not any problem with your phone or the battery. For one thing, the battery meter on the phone is not very precise. Even when you charge to 100%, the battery may not really be at 100%. So, when you check on your battery charge on your phone, it appears that the battery discharged "about 8-10%" after rebooting. Also, your battery is always being used up (discharged) if your phone is turn on, even if you are not using your phone for any activity. I found a thread that explains how things work with the Lithium Ion (Li-ion) batteries in Androids.

Here are a couple of quotes from the thread and a link at the end of this post to the battery thread. "The charge light turns green before the battery is 100% charged." and "When plugged in, after fully charging the charger will not turn back on until the battery has discharged to a set threshold."

If you want to get an Optimus, rather than keep using your Precedent, go ahead. But, the battery in the Optimus will likely act the same as your Precedent.

Here is the link: http://androidforums.com/htc-droid-eris/262818-food-thought-about-batteries-charging.html

If you want to know even more about Li-ion batteries, here is another link: Basic to Advanced Battery Information from Battery University

 

[androidfear93]

Ok thank you I have decided to keep my precedent after reading this. So its normal that after rebooting my phone, the battery decreases this much? I mean it doesn't happen every time I reboot but it still happens at random. And yea you may be right about the inaccuracy because it strangely doesn't take long for my phone to charge sometimes.

 

[androidfear93]

Hello, I have another question. My phone powered off and restarted today all on its own. And when I looked at the battery usage information, it says it was just unplugged from the wall even though I unplugged it from the wall 8 hours ago. And now it seems that every time I restart the phone, it resets the time that the battery has been unplugged from the wall and says that the phone has just been unplugged. Is all of this normal?