L.L. REPLACEMENT Cordless Phone Battery for AT&T / VTECH 1231, 2231, 2419, 2420, E1215, E1225, E2115, 80-5542-00-00, 80-5543-00-00 & Others (single) High Quality Reachargeable/Replacement battery Designed to meet or exceed performance of original battery. Capacity: 1000mAh. Color: Fruit Green. Voltage: 3.6V (Compatible with 3.7V). Unique design only allows battery connector to be installed one way, preventing short circuiting of the battery and device