I bought this off of eBay and it is an OEM Motorola battery with a well made charger.... I have it on my Droid now and I can't tell which was the orogonal that came with my Droid... they both last all day with a decent amount of web browsing and listening to music, on top of normal phone use. Highly recommend this, and it arrived in only about a week instead of the 14 days they overestimate.

For Motorola Droid A855 1390mAHh BP6X Battery + Charger - eBay (item 270564346781 end time May-15-10 20:36:32 PDT)