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I had an issue where my phone would go from full battery to nearly dead after a day of idling unused in my desk drawer. The Android Battery app would just list

I had an issue where my phone would go from full battery to nearly dead after a day of idling unused in my desk drawer. The Android Battery app would just list "Android System, Android OS, etc" without pointing out any culprit app. I eventually figured out that Google Chrome was to blame and disabling Chrome (unable to uninstall it) fixed the problem. What was Chrome doing all day while my phone was sitting idle? I don't know, I never used Chrome as a brower, it's still a mystery to me. Hangout was another problem app. Hangouts liked to crash, and after crashing it would leave something still going that would drain the battery unless I manually killed the Hangouts process. These anecdotes are just to say I've found my battery problems are typically some app doing something bad without my knowledge. I'd like more strict control over background processes as well.

pasbesoin 9y ago
I would experience accelerated battery use after system updates were installed. Same deal, as I recall: Something buried within the "Android System" categorization. For my case, I found that a hard reboot -- turning the phone off and then back on -- brought resource/battery use back in line. That is, an additional reboot, after the one initiated by the update process, itself. I never did encounter an explanation for this. After my Nexus 5X -- whose battery life was already starting to shrink more and more -- bootlooped at about 1.3 years old... Well, I look at my friends with iPhones that "just work" and last until new features compel them to upgrade their device. And it's increasingly tempting... (Just, I don't want to drop a grand on a phone, per the reported upcoming pricing for the iPhone 8.)