5 Pack of VTech CS6509-16 Battery - Replacement for VTech Cordless Phone Battery (800mAh, 2.4V, NI-MH) Replacement VTech CS6509-16 Battery Replacement Cordless Phone Batteries Capacity: 800mAh, 2.4V, NI-MH Rechargeable Battery CE Approved and Safety Assured 1 Year Replacement Battery