Compatibility: Panasonic Toughbook 31, 51 (MK3), 52, 53, 74 (mountable) The DC laptop power adapter's circuitry adjusts the output power to the full operating requirement for this series of laptops. The Lind DC/DC adapter for the laptop(s) listed above will operate these laptops and recharge their batteries. - This adapter is housed in a mountable rugged ABS case and sealed for durability. - Output short-circuit protection. Safety current limiting. - Internal temperature limit cut-off circuitry. Automatic reset after cut-off conditions return to normal. - Under-voltage and over-voltage protection. - 3 year warranty includes repair of damaged or broken plugs and cables. RoHS compliant.