Amazon.com: FDK OEM NiMH Replacement Battery compatible with Braun Oral-b Type 3731 or 3745 Toothbrush, with Narrow tabs (42L x 17D mm, 2150 mAh) : Health & Household
Battery for Toothbrush Oral-B Type 3731, 1.2 V, NiMH: Amazon.de: Health & Personal Care
vhbw Battery 2500 mAh (1.2 V) for Braun Oral B Trizone Toothbrush Cleaning, Vitality, Like braun 3731, 3738. : Amazon.de: Health & Personal Care
BRAUN ORAL B 3731 USER MANUAL Pdf Download | ManualsLib