Lenmar NVC250 250-Watt N-Verter by Lenmar. $33.97. Lenmar''s N-Verter is an electronic device that converts low voltage DC (direct current) electricity from a battery to 110/120 VAC (alternating current) standard household power. The AC output of this product is a modified sine wave with a voltage of 110/120 volts. With your Lenmar N-Verter you can power your laptops, computerized games, cell phones, camcorders, power tools, reading lamps, fans and more.. Save 15% Off!