L.L. Cordless Phone Battery for VTech 5105, 5145, BT-5632, BT-5872, 89-1333-01-00 & Others. (2 pack). High quality replacement battery. Designed to meet, or exceed, performance of original battery. 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 orignial battery, that is shipped with the device.