I've got a Nexus 4 on OS version 4.2.1 that suddenly started to drain it's battery very quickly. When looking in the battery usage I see "Mediaserver"eating 60% of the battery over time, with several minutes of CPU time logged and several hours of Keep Awake time. Typically the screen, phone idle or other services eat up the majority of battery life.
I tried closing all apps and charging it up, and sure enough overnight it still drained significant battery, again Mediaserver was the culprit as reported in the Battery usage chart; it had kept the device awake all night and drained 10% of my battery despite zero use. I haven't added a large number of files and I'm not playing music/etc so Mediaserver shouldn't be doing very much on the drive.
How can I stop Mediaserver from eating my battery life like this?
Answer
Killing all running apps didn't solve the problem, nor did disabling the automatic sync for Google account items like videos/photos (which I heard suggested for a similar battery issue).
What did work was simply rebooting the device by holding the power button and picking shut down. After rebooting Mediaserver no longer appears to use much of my battery in the usage chart and my charge lasts like it always did. So if you get the same issue, just reboot.
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