G+_Tom Wiswell Posted July 9, 2015 Share Posted July 9, 2015 I have a Nexus9 and my battery doesn't last very long when watching videos or playing games. I bought an external battery, but it can't keep up with the battery drain. My question is are all external batteries the same? Will some keep up better than others and what should I be looking for?? Link to comment Share on other sites More sharing options...
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