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Re: Battery drain when idle
I also got excessive drain when the tablet was idle even in airplane mode, especially when docked with the keyboard. I figured out a way to all but eliminate the drain for me.
Originally Posted by HaveADay
I have a 32 GB microSD card in the tablet and an 32 GB SD card in the dock. Both cards are loaded with tons of pictures and videos. When the micro SD card is in the Prime and the SD card is in the dock, drain while idle is 2-3% per hour for the tablet and 5% (or more) per hour for the dock. The dock drain is especially concerning since it quickly eliminates any battery-life boosting benefits of the dock if a large amount of idle time is involved. For an experiment I tried removing both the micro SD and SD cards to see if the drain while idle changed. After removing the SD and micro SD cards, I saw drain of 1% on the tablet and 2 % on the dock after 11 hours of sitting idle. For comparison, if the SD and micro SD cards were in the tablet and dock, the tablet's battery would be at 67-78% and the dock would be at 45% or less.
Maybe it is the large collection of media that the Prime is trying to process while it is idle, but removing the SD and micro SD cards made a huge difference for me. Right now I can have a very large amount of storage with poor standby battery life or much less available storage with exception standby battery life. Hopefully this is something that ASUS can address in the future because I want both, expandable storage and exceptional standby battery life.