AccuCell battery compatible with Oral-B Professional Care 8000 with 2700mAh, please check dimensions 50x17mm. High-quality replacement battery suitable for the Oral-B Professional Care 8000 series. Single battery with solder tabs, negative pole slightly offset to the left (perfectly designed for installation, the solder tabs can be trimmed with side cutters, etc.) in U-shape approximately 3mm wide (extending in the same direction, U-shape) for soldering onto the circuit board, PCB, etc. This replacement battery with 2700mAh and optimal performance can be used as a replacement for the following model series: Oral-B Professional Care 8000 battery, Professional Care 8300 battery, Professional Care 8500 battery, Professional Care 9500 battery, Triumph 4000 battery, Triumph 5000 battery, Triumph 9000 battery, Triumph 9400 battery, Triumph 9500 battery, Triumph 9900 battery, and all similar models. Also compatible with Oral-B battery types 3731 and 3738, TRIUMPH Professional Care 9000 battery, Type 3731 battery A627 1 0827 N2820. Technical specifications, please check the dimensions of your battery before ordering to ensure compatibility: System: NiMH battery with U-shaped solder tabs, Voltage: 1.2 Volt, Capacity: 2600-2800mAh, Dimensions (LxDiameter): 50 x 17 mm, Weight: 55 grams. A customer says about the product: "I installed this battery in my Braun Oral-B Professional Care 9500 (Triumph D 25.546.4) electric toothbrush. The battery fits perfectly. Battery life is back to what it was when I bought it 7 years ago. The bottom cover of the toothbrush was quite tight, and I used an internal hex key, although I had to squeeze it a bit. But it works!".