After hearing and reading about various aftermarket battery horror stories, I’ve generally steered clear of these bargain basement offerings. Recently I ran across a battery thread on xda developers regarding an extended 3500 mAh aftermarket battery for the Optimus 2X / T-Mobile G2X. The extended battery is also available for various other models.
The bargain priced Chinese extended battery is available on Ebay for as little $13.89 shipped. I followed the thread with interest for several weeks and after receiving generally positive reviews from users, I relented and ordered one.