We have chargers that have microprocessor controlled fully automatic Battery Chargers for all sealed valve regulated, gelled & liquid lead acid batteries. Voltage range from 6 to 48 volts, with DC outputs from 1 to 30 Amps. International voltages, custom designs and private label available. Features include: Patented proportional, timing for extended battery cycle life, Auto override timer that safely shuts down defective batteries & alerts the user, Battery Type switch to select the proper charge format for specific battery technologies, Custom charge designs for all battery charging systems.