Replacement Battery (O14) for Braun Oral B Sonic Complete OralB with 2.4V - 1400mAh - Ni-MH.
Perfect fit, easy replacement if one has some skill and a small soldering iron. However, is not always the Accu defective, it can also be the charging electronics. The handpiece have to open first time and measure, or test with another Accu. Instruct