My Droid showed 100% battery charge last night when I powered it off. When I turned it on this morning it showed 70%. What gives? Is this phone running all the time, even when it appears to be powered off?
Update: I recently learned that applications running on Android can implement what is called a "partial wakelock" which prevents the CPU from going to sleep. Apparently it was discovered earlier that the built-in messaging app on the Sprint HTC Hero did this, resulting in a battery drain issue. With this in mind, I decided to do a factory reset (removing all apps and system settings). Then I repeated my overnight, power off battery drain test with no third party apps installed. Sure enough, after 8 hours I was still at 100% charge. I have not yet reinstalled any apps so I can't identify the culprit
Anyway, I am glad I was patient and did not try to exchange the phone since this could easily happen again with another poorly written app
Update: I recently learned that applications running on Android can implement what is called a "partial wakelock" which prevents the CPU from going to sleep. Apparently it was discovered earlier that the built-in messaging app on the Sprint HTC Hero did this, resulting in a battery drain issue. With this in mind, I decided to do a factory reset (removing all apps and system settings). Then I repeated my overnight, power off battery drain test with no third party apps installed. Sure enough, after 8 hours I was still at 100% charge. I have not yet reinstalled any apps so I can't identify the culprit
Anyway, I am glad I was patient and did not try to exchange the phone since this could easily happen again with another poorly written app