I've purchased Anker 1600 mAh battery on ebay. As soon as I get it and test it will come back here and say what my experience with it says!
I received my anker 1600maH from amazon a few days ago- it was the highest rated battery on amazon for our phone and the only one that consistently held strong reviews- the lowest reviews stated that they found no power increase over the OEM, whereas others found a major increase. In my case I've been using the original for nearly nearly 2 years, and the battery was pretty shot. I switched for a newer battery and I'm definitely noticing an increase in battery life. I've been using battery monitor widget, and with my previous battery I measured at around 650maH (+-60%, which isn't reassuring, but it consistently stayed there after flashing various roms and measuring for around month). The new battery measures in at ~1300maH, +-55%. Time will further tell.
Oh, further edit: I purchased the battery for $7.99 (USD, for canucks and aussies out there), and with free shipping. It arrived in less than a week.
