Stop SD card from constantly unmounting due to underpowered I had problems with constant unmounting of my SD card from phone when it was not on charger. The problem was with powering off some power when disabling display to save energy, but this power was needed to keep SD card mounted.

My phone is LG Optimus L1 II E410, but from what I found during my long search for solution, it is not the only phone affected.

How can I stop this from happening?
The solution is to install program Wake Lock and set the setting to PARTIAL_WAKE_LOCK. This keep necessary power for SD card even if of charger and with disabled display. It obviously cause a bit more battery consumption, but far less then constant SD card remounting. No root needed.