Replacement battery fits 10 TOA compatible models. Specifications: 2200mAh, Li-ion. Compatible with: TS-800, TS-801, TS-802, TS-821, TS-822, TS-900 and 4 more compatible models. Replaces: TOA BP-900, TOA BP-900UL, TOA BP-920. TOA replacement battery designed for Communication & Conferencing devices. Simple plug-and-play replacement requiring no modification.