Kastar HHR-P511 / HHR-P402 Battery (10-Pack), Type 24 / 30 NI-MH Rechargeable Cordless Telephone Battery 3.6V 1800mAh, Replacement for Panasonic HHR-P511, HHR-P402, P-P511, P-P511A, HHR-P402A Kastar Brand Replacement NI-MH Battery. High Quality, Long Lasting and Manufacture Price. The Battery 100% Compatible with the Original Batteries and Chargers. High Capacity. Use high quality Japanese Cells for longer battery life with no Memory Effect. Use Integrated Japanese microchip which can prevent the overcharge and overdischarge. The Battery Include 30-DAY Money Back and 3-YEAR Manufacturer Warranty.