[Moto G Q&A, Help & Troubleshooting] scott_doyland:
This thread is specifically about battery drain caused by something unknown, not an app or wakelock, I think we should try to keep it clean by not cluttering with app related issues as that can then be confusing for people who are reading through the thread. Thanks.

---------- Post added at 11:40 AM ---------- Previous post was at 11:16 AM ----------

Well I cant answer all your questions but I will tell you about my test last night. I hardly use GPS at all (and my battery is normal) and last time I did use GPS I had the battery drain as per my post above, so last night I:

1. Drove 15mins from my house.

2. Switched on GPS (high accuracy).

3. Started google maps and drove for 2mins with GPS in use.

4. Shutdown maps app and drove home (GPS still on - ie high accuracy).

5. At home used phone for bit of XDA on wifi for a bit.

6. Switched on airplane mode but location service still on (note airplane mode does NOT switch off GPS), woke up at 02:00AM and noted I had the annoying battery drain - arghhh.

7. Switched off GPS - woke up 2 hrs later and drain still happening.

8. Switch off location altogether - woke up in morning and drain still happening.

9. Rebooted phone and now battery back to normal, Im back on wifi/mobile location (battery saving).

So to me it looks like its maybe related to GPS in some way but whether its purely GPS or a GPS/wigi/location combo I have no idea.

However I have in the past switced on GPS in my house just to play about and havent has the drain, so is it due to a larger change of location when GPS is on (ie 15mins drive from my house) that causes it to go bad.

So annoying, I took a CWM backup before I booted up my phone so I will pull that to my laptop and see if there are any obvious error logs to look at but I doubt it.

Im still leaning towards a driver issue or maybe some component, eg GPS chip, staying alive/awake even when not in use but m sure others have reported they have it with location/GPS off completely. Maybe its even a few different problems.

You said not everyone has the error, but I bet quite a few non-xda people do but do not realise. A lot of people will just charge their phones overnight so wont even realise, during the day they will think ~2% drop per hour is normal. Even if they do notice the drop in airplane mode they probably think thats normal and ignore it.

I think getting Motorola to accept there is an error is going to be almost impossible especially if its hardware related. Also as we have unlocked bootloader I doubt they will even accept a call once they know that.

I think it would be interesting to get a list of phones that are affected, ie model, serial no, location brought, ROM etc. maybe its a certain batch of phones, if we can determine that it would be some help, maybe we could buy one that isnt affected ;)

So to start it off my phone is

XT1032 UK retail brought from Basildon, Essex, UK from phones4u.

Problem happens on 4.3 stock and 4.4.2 stock.

Baseband version is MSM8626BP_1032.340.63.00R.

Im tempted to flash GPE and/or new basenband radio but I bet the same thing happens.

I may see if there is a new GPS driver but no idea how to flash it etc.

Such a shame as this phone is excellent for me otherwise.

Just seen this thread as well, it blames GPS

http://xdaforums.com/showthread.php?t=2607641