Replacement Toothbrush Battery for Braun Oral-B Li-ion Genius Pro Smart 4 5 6 X | eBay
49mm x 14mm Li-ion Oral-B iO Series Toothbrush Battery - ToothbrushBattery.com
Amazon.com : Upgraded 800mAh 3.7v Li-ion Electric Toothbrush Replacement Battery Compatible with Philips HX9360 HX6340 HX6610 HX6970 HX6511 HX6711 with Extra Rubber Seal : Health & Household