49mm x 14mm Li-ion Oral-B iO Series Toothbrush Battery – 740 mAh

This iO Series toothbrush replacement battery is what you need to bring your dead toothbrush back to life! Fits Braun Oral-B iO series iO4, iO5, iO6, iO7, iO8, iO9 and iO10.

Battery degradation is an inevitable part of your electric toothbrush’s lifespan ¡ª extend it with this replacement battery. If your electric toothbrush won¡¯t turn on, won¡¯t hold a charge, or you simply experience poor battery life, this replacement battery may be what you need to fix it.

For optimal performance, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least 2 more hours. Then use your device until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.