The DEWALT XR Slide Li-Ion Battery Pack has a compact, lightweight design. No memory effect and virtually no self-discharge for maximum productivity and less downtime. An LED state of charge indicator helps to manage charging/working time.Compatible with all 10.8V and 12V XR slide on tools and most XR chargers.1 x DEWALT DCB126 XR Slide Battery Pack 12V 5.0Ah Li-ion.