Hello, just joined recently (after buying my first m43 - the tiny EPM1). Was looking for a battery and found this on overstock. Cheapest I could find, and seems to have good rating on Amazon. Link to overstock. PS. from my understanding the BLS1 works for all Olympus PEN cameras from EP1 to EP3. If you're with fatwallet, they give 3% cashback also. Enjoy & Merry Christmas!