I ordered an extended life battery (1600mah) from obostore.com. I was a little leery about ordering because the price was so low, $8.49 u.s.
Well 8 days letter I received my battery. Nicely packed, no shipping charges incidently, and the battery is heavier than the one that comes with the droid. I used it today and I am pleased, it does hold a charge longer than the original battery. I give obostore 5 stars!