Mugen Power 1550mAh Extended Battery for Acer neoTouch S200 / Acer Liquid S100 / Acer Liquid E

Product Review (submitted on October 26, 2011):

I friend my stock battery after just over a year of use, and this battery lasts for usually over 12 hours on a single charge. I highly recommend getting this, I don't know why Acer doesn't ship phones with it already, given how cheap it is.