4 Pack AT&T - LUCENT 2401 / 2403 / 91077 / 5017 / BY03 - Battery for select AT&T E252 , E2562 , E262 , E2662 Cordless Telephones - Includes Accessory Bag Accessory Power Brand, Non-OEM Equivalent; Replaces Part # : 2401 / 2403 / 91077 / 5017 / BY03E / BY03K Designed to meet or exceed OEM specifications Chemistry: Ni-MH, Capacity: 1500mAh, Voltage: 2.4V Constructed from premium nickel-metal hydride cells for quality and performance Guaranteed Quality - 3 Year Manufacturer's Warranty