2Pcs1800mAh PS BLM1 BLM 1 BLM1 Replacement Battery for Olympus E 300 E 330 E 500 E 510 C 5060 C 7070 C 8080 E 1 E 3 E 30 E520|for olympus|olympus batterybattery olympus - AliExpress
Kastar Battery (2-Pack) and Charger Kit for Olympus BLM-1, BLM-01, PS-BLM1 Work for Olympus C-5060, C-7070, C-8080, E-1, E-3, E-30, E-520, EVOLT E-300, E-330, E-500, E-510 Cameras - Newegg.com
wrotniak.net: E-510 by Olympus, a Technical Review