One M8 poor battery performance

[simonmurray]

I have had this phone since April, and love it, but over the last few months I have noticed a decline in the battery life, pre Lollipop, and still after installing it, and it now barely lasts the day, and I am having to re-charge it once I get home from work. I am seriously concerned it is going to give me bother when I go on holidays soon.

I am really disappointed, and cannot envisage this product lasting until, April 2016.

I always charge it fully over night. In my opinion I use it very little throughout the day.

I always have the power saver on, and auto light feature. I keep Wifi and Bluetooth off, and only turn on when necessary/required.

I have contacted HTC, and performed their diagnostoc test on the battery, and they say if it goes below 90%, it needs returned, in two tests mine has given 90 then 89%, so it meets their crietria for a bad battery.

Can someone from VF recommend a course of action.....as this is not going to function satisfactorily until the end of its intended minimum life of 2 years?!

I also want to point out that for the final ~6 months of my last HTC One X, I also suffered similar severe battery shortfall, and it struggled to get through my 2 year contract.

Its a fact, current phones of most brands do not lat the planned and intended contract length that all providers selll them for!!!

[hrym]

If there's a battery issue, I'd recommend going to HTC for a repair.  However, I'm concerned that you've had the problem on another device as well.   It sounds like an app and it may be a little difficult to track down.  I'd start by installing a data monitoring app.  This won't tell you about battery usage, but it might show up something that's updating its content more frequently than it should.   I use My Data Manager, but there are others.   Most can analyse usage down to the app and the hour.

[simonmurray]

Don't know how this text and the correct tiel got intop my other thread....but anyway....

I'm confused.....I understand I should conduct some monitoring, before sending for repair, but surely I need to monitor apps & processor, not data downloading!? Can you recommend an app for this?

M phone died yesterday at 7pm.

I am now using "OS monitor" app and nothing untoward at the moment, but yesterday before it quit facebook app was using 50-60% of cpu?!

[hrym]

Monitoring battery usage is more difficult.   There's a summary in Settings|Batttery that'll show you what's using power by percentage, but that's not much help - it'll probably be the screen.

I suggested data monitoring as, if it's an app, there's a chance that it's also using data and that would be the easiest way of identifying it.

Failing that, you could do a factory reset and then run the phone vanilla, with no additional apps installed, for a day or two.  If it's stable then, add your apps back one by one until the problem recurs.  The last one in would be the culprit.