Nana industries provides a battery charger, model mark-i. Constructional features of these battery charger are like portable, light weight yet sturdy battery charger . Typical application of this battery charger is mostly for all types of cars, jeeps and lmvs, etc. It is housed in a well ventilated steel cabinet and painted from both sides with acid resistant two tone staving paint. This user-friendly unit has all necessary indications and protections such as, amp meter, output side fuse, system on/off switch + indicator, very unique feature of reverse polarity indicator, heavy-duty charging forks with 3 meters calibrated charging cord, etc. Some of the technical specifications includes: input - 220/250v 1 -pase, 50 c/s ac supply; output - 12v dc; output current - 4 a; rectifier - full wave bridge silicon solid state; dimension - 165 h x 230 w x 120 d in mm; and weight 3.6 kg approx. Some of the salient features includes : protection against overload and short circuit; maintenance free; sturdy design and robust construction; copper wire transformer; precise charging; no effect of voltage fluctuation; spacious and convenient front panel for easy operation; reverse polarity indicator; calibrated long length charging cords; and no need to disconnect or remove the battery from the vehicle.