CS-OBT400SL Battery – Oral-B 9900 Toothbrush Professional Care 8000 Professional Care 8300 Professional Care 8500 Professional Care 9500 Triumph 4000 Triumph 5000 Triumph 9000 Triumph 9400 3731 3738 Replacement
CS-OBT400SL Battery Replacement
Premium replacement battery for Oral-B 9900 Toothbrush Professional Care 8000 Professional Care 8300 Professional Care 8500 Professional Care 9500 Triumph 4000 Triumph 5000 Triumph 9000 Triumph 9400 3731 3738. 2500mAh 1.2V Ni-MH — engineered to original specifications and certified for safe transport.
| Model No. | CS-OBT400SL |
|---|---|
| Fits | Oral-B 9900 Toothbrush Professional Care 8000 Professional Care 8300 Professional Care 8500 Professional Care 9500 Triumph 4000 Triumph 5000 Triumph 9000 Triumph 9400 3731 3738 |
| Capacity | 2500mAh |
| Voltage | 1.2V |
| Energy | 3.0Wh |
| Chemistry | Ni-MH |
| Dimensions | 49.80 x 17.30 x 17.30mm |
| Weight | 37g |
| OEM Part No. | 3731, 3738 |
Compatible Devices
- Triumph 4000
- Triumph 5000
- Triumph 9000
- Triumph 9400
- Triumph 9500
- Triumph 9900
- Professional Care 8000
- Professional Care 8300
Related Batteries
- CS-OBT850SLOral-B Triumph 4000
- CS-WSR300SLWaterpik Sensonic Plus SR-3000 Sensonic Plus SR-3000E BK-4MCCE
- Volume discounts from 10 pcs (up to 10% off)
- UN 38.3 certified + MSDS/SDS provided
- Free US shipping on every order
- B2B invoicing & wholesale support
FAQ
Is this battery compatible with my device?
The CS-OBT400SL is a replacement battery for Oral-B 9900 Toothbrush Professional Care 8000 Professional Care 8300 Professional Care 8500 Professional Care 9500 Triumph 4000 Triumph 5000 Triumph 9000 Triumph 9400 3731 3738. See the compatible device list above for verified fits. Match your original battery's model or OEM part number before ordering.
What certifications does this battery have?
All Estry batteries ship with UN 38.3 transport certification and MSDS/SDS documentation, required for compliant air and ground shipping.
Do you offer wholesale pricing?
Yes — volume discounts apply automatically: 5% off at 10+, 6% at 20+, 8% at 50+, and 10% at 100+ pieces. US shipping is free on every order.