ATC High Capacity Cordless Phone Battery for Panasonic HHR-P104A and KX-TG5421 KX-TG5422 KX-TG5431 KX-TG5432 KX-TGA545 KX-TGA546 KX-TGA547 KX-TGA548 Series High Quality Replacement battery manufactured by ELEOPTION Designed to meet or exceed performance of original battery. Battery shrink wrap casing made of 100% post consumer recycled product (May vary in color based upon market availability as such, no varying in functionality) Unique design only allows battery connector to be installed one way, preventing short circuiting of the battery and device Internal cells are of superior quality to the original battery that shipped with the device. Fresh stock, less than 12 months since manufacturing - 10 year shelf life rated, buy an extra set! Battery must be professionally replaced to qualify for Lifetime warranty with proof of installation (Receipt, work order, etc)