When charging my phone overnight, sometimes it does not charge to 100% but rather 99%. This is not a big deal in the grand scheme of things - but I am curious if it speaks to a bad battery or if others have experienced this same thing?
I saw this a few times on my V1 when I was jailbroken and had battery percentage enabled - I think disconnecting the iPhone from the dock/cable and then reconnecting it and letting it charge for another minute fixed it.
Hopefully it is just the fact that all the cells in the battery aren't fully chargeable...yet. With more use they should all be able to hold a 100% charge because I've seen this a couple times on my 2nd S(went from 16gb to 32gb phone).
Battery life is actually quite good even when it happens.
This was happening 2 with my iPhone and I remembered that this happened with my macbook pro as well. I did a little "research" on google and what i needed 2 do was 2 let the battery go down past 80% or so, then plug it back in a let it charge... i did that and the battery charged fully... i did the same with my iPhone and it worked, my battery charged up 100%
I had mine like that this morning. It always charged up to 100% and very quick. I thought it was fully charged and I unplugged it, it was only 99% and I thought, what was wrong? I plugged it back in and it instantly said 100% and after few seconds it came down to 99%. I unplugged and plugged it back in and said 100% again and pulled it out. I'm sure it's fully charged and it's holding it's charged very well. I started this morning fully charged, I watched full 2 hour movie and some web browsing and only used 10%. I think that's good.
On my 3G, (and others have stated this too) I get the plug icon at 99%. It usually takes another 30-50 minutes to charge that last 1%. The closer you are to topping off, the longer it takes to charge.
reboot your phone every 3 days or so, keep the phone topped off as much as you can, and drain to 20% and fully charge once a month and it should be fine.
This is why I turned off battery %. I don't think that anomaly indicates anything other than the fact that it's difficult to precisely pinpoint the actual charge of a battery, and offsets are likely to occur.