Battery drain in morning

[ozarkham]

Can anyone explain why the battery takes an initial hit of 5 to 10% when turning on the phone and just reading email. Seems like a big drop within minutes of turning on the phone.

 

[victek]

Can anyone explain why the battery takes an initial hit of 5 to 10% when turning on the phone and just reading email. Seems like a big drop within minutes of turning on the phone.

I have a theory about it, which is either the software that measures the battery state is inaccurate or the battery discharge does not follow a linear curve. I also notice that the first 5% of the battery goes quickly and doesn't correspond to actual usage, hence my theory But I would also like to hear from those more up on the science.

 

[gangsterazn]

Can anyone explain why the battery takes an initial hit of 5 to 10% when turning on the phone and just reading email. Seems like a big drop within minutes of turning on the phone.

From what I have read around here, the battery charges to about 100% and then it drops and charges back up, drops and charges back up, etc. So therefore, when you take your phone off the charge in the morning, the battery isn't initially completely full. This is why there is talk about bump charging, which is basically forcing the battery to charge up to a legit 100%. It basically takes that battery that is going from 100% to 95% to about 100% to 96% then bump it all the way until it is at a full 100%.

Someone can correct me if I'm wrong since I am not that knowledgeable about this stuff.

 

[hilmar2k]

^^^^^ 100% correct.

Your phone lies to you about being 100% charged so you don't think something is wrong with your phone and/or charger. To maintain the life of the Li-ion battery, it is not kept at 100% charged. Doing so would result in needing a new battery every 3-6 months.

 

[nate.kelmes]

Yup... everything here is just about right. When your phone is plugged in and at "100%" that number will quickly drop to about 90% within the first hour or two of being unplugged. This is because your battery was never really at 100%. This is why people like to 'bump charge'. It fills that last 10% of the battery so they get just a little bit more out of it during the day. The only downside to bump charging... possibly significantly diminished overall battery life.

But... batteries are cheap.