I've recently got the new HTC Desire HD, which has a poor battery to start with (1230 mAh), but in the last two weeks I've had several nights waking up with a dead battery.
The first few nights, I suspect that wifi was still running and by default the radio didn't go to sleep when it's idle (changed that). I reduced syncing frequencies for most services to once a day, so that can hardly be the problem. When looking at the battery usage reports, it's mostly the huge screen draining the battery, but that's turned off at night. Last night I turned off any data connection and went to bed with 90% battery and woke up with a dead one.
So what on earth is crashing my battery so quickly? Does anyone have any suggestions other than the no-brainers mentioned here.
Answer
I ended up trying several things mentioned in the XDA-developer thread:
- Changing the Networkmode from GSM / WCDMA Automatic to either GSM or WCDMA, XDA-users claimed that switching between these two modes is a huge battery drainer. In my experience this was the most important one.
- Installing a widget, so I could check whether Bluetooth and GPS were really turned off. Especially GPS could run in the background, after using Google Navigation, without displaying the icon.
- Turn off syncing for apps you don't really use or rate limit updates to a larger interval. You can always update manually and getting new contact info once a day is more than enough!
- Remove widgets that need regular updates, even though the sync setting should have control this.
- As I'm using a HTC Sense phone, I turned off all their proprietary apps, I simply don't trust the power usage of things like Footprints.
If you apply all these settings, you should manage to get a full days worth out of your battery, unless you play too much Angry Birds.
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