2Pcs PS BLM1 BLM 1 PS BLM1 Battery +USB Dual Charger for Olympus E 300 E 330 E 500 E 510 C 5060 C 7070 C 8080 E 1 E 3 E 30 E520|charger for olympus|for olympusolympus usb charger - AliExpress
Olympus E-510 battery: what are the options?
biofos.com; Olympus E-3 review.
Review: Olympus E-510—Snap into a Beefy Shooter | WIRED
WTSell: Accessory - Olympus Battery Grip for E500/E510/E520 or other model | ClubSNAP Photography Community