The Brother PA-BT-4000LI Lithium-ion Rechargeable Battery Pack (14.4V, 1800mAh, 26Wh) is for use with Brother RJ-4030, RJ-4040, TD-2120N, TD-2130N, TD-2130NHC, PT-P900W and PT-P950NW label printers. It requires an optional battery base unit PA-BB-001 for TD-2xxx and PA-BB-002 for PT-Pxx.