BT-17333 Battery for VTech CS5111, CS5121, CS5121-2, CS5111-2, CS5121-3, CS5211 Cordless Phones (600mAh, 3.6V, NI-MH) Replacement Aastra Telecom JB950 Battery Replacement for Aastra Telecom Cordless Phone Batteries Lifetime Warranty Capacity: 600mAh, Upstart Battery Brand On Sale for a Limited Time!