Replacement battery fits 5 NEC compatible models. Specifications: 2000mAh, 7.2V, Ni-MH. Compatible with: ClearOne Max, ClearOne 592-158-003, ClearOne 592-158-001, ClearOne 592-158-002, Conference Max Plus. Replaces: ClearOne 220AAH6SMLZ, NEC 750074. NEC replacement battery designed for Communication & Conferencing devices. A direct drop-in replacement for the original battery.