ubuntu-phone team mailing list archive

[Guillaume F <marsguo@xxxxxxxxxx>]

Le 16/01/2017 à 11:43, Sam Bull a écrit :
> Everything I've ever heard about Li-ion batteries suggests that a full
> discharge damages the battery and reduces its life expectancy. I've
> seen recommendations not to allow the battery to go below 20%, and
> other suggestions to aim to keep the battery in the range of 40-80%
> (possibly with an occassional 100% charge).

Well, the problem is, I have no way to know how much battery I have 
left. The statistics are completely incorrect. Which means that even 
though it shows something like 56%, it actually is 0% and it turns off 
by itself. And 56% is not my new 0%, meaning the phone may die with 60%, 
20%… So I can't really follow theses recommendations, my phone has 
decided against it :). Plus, I bought a brand new battery and didn't 
have the time to damage it.


Le 16/01/2017 à 12:46, advocatux a écrit :
> I think Guillaume means he let the phone turn off when battery ran 
> low, not a real full discharge because, as you said, that is not good 
> for a Li-ion battery.
>
> BQ has several articles [*] about this topic in general, and about how 
> to calibrate the battery in your BQ phone in particular.

Thanks for those articles! I don't read Spanish, and I can't testify for 
Google's accuracy, but the article you sent me seems to go against what 
you say (part of it at least). It's clearly written that you have to let 
it discharge fully in order to calibrate the battery. It even goes as 
far as suggesting we should do this once every two months. That's 
exactly what I did when I replaced my battery, but it didn't stop my 
phone from dying with supposedly 53% battery on the next discharge.



Guillaume