Synergy Digital Cordless Phone Batteries, Compatible with AT&T CL82557 Cordless Phone, (Ni-MH, 2.4V, 750 mAh), Replacement for AT&T BT166342 Battery, combo-pack includes: 3 x SDCP-H334 Batteries
Specifications:
Battery Chemistry: Ni-MH
Voltage: 2.4V
Capacity: 750 mAh
Compatible with: AT&T BT166342 Battery
Works for: AT&T CL82557 Cordless Phone and many more