Battery-Biz Inc. 3.6 Volt NiCad Cordless Phone Battery Three AA cells in plastic casing with two contacts on top. 100% OEM compatible Full one year warranty Guaranteed to meet or exceed original specifications NiCad Compatible with Panasonic KX-TG2227 cordless phones Guaranteed by Battery Biz to meet performance specifications of Panasonic P-P511 3.6V NiCad battery, 0.85 amps Measures 1.97 by 1.66 by 0.57 inches A quality Battery-Biz product