Axiom 2Pack Ni-MH Rechargeable Battery For AT&T Vtech BT166342 BT266342 BT183342 BT283342 Long-Lasting Axiom Ni-MH Rechargeable Battery Capacity (Power): 850mAh. Greater "mAh" represent the power of the battery and provides more talk time. Brand New: Axiom Rechargeable Ni-MH Battery Package Includes: 2x Axiom rechargeable cordless-phone Batteries