Panasonic KX-TG4022N Cordless Phone Battery Ni-MH, 2.4 Volt, 900 mAh - Ultra Hi-Capacity - Replacement for Panasonic HHR-4DPA, Jabra AHB5-2229PS Rechargeable Battery Replacement Battery for Panasonic HHR-4DPA - Ni-MH, 2.4 Volt, 900 mAh. 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark