Dewalt DCB127 XJ - 2.0 Ah, 10.8 V XR Li-Ion Battery Pack comes in lightweight design providing the user to use the device with ease. XR Li-Ion Battery has no memory effect and no self-discharge for increasing productivity and less downtime. Dewalt DCB127 XJ is compatible with all DeWalt 10.8 v tool with slide pack design. It has absorber for the acidity of batteries.