Battery Charger for Toughbook 19 Mk4, Toughbook 19 Mk5, Toughbook 30, Toughbook 31 Mk1, Toughbook 31 Mk2, Toughbook 52, Toughbook 53 Mk1, Toughbook 74 CF-VCBTB2W

This charger has to hook to the Panasonic Toughbook for to charge a battery.  It allows you to charge a second battery but it does not plug in seperately to an ac adapter, the laptop has to be present for it to charge a battery because the laptop is it's power source.