With a DC Voltage Doubler, you can power higher voltage fans, lights, and most electronics (including LED lighting) directly from a lower voltage source battery with zero electrical system modification.
Units are available to double either a 6V or a 12V source battery, and deliver up to either 2 amps or 7.5 amps of smooth, low ripple DC current to a load.
Conversion efficiency is as high as 99 percent to make maximum use of your expensive battery power - the best of any conversion typology. Efficiency remains high even under partial loading, while only a minuscule16 mA (about the same as an LED) of current is required in standby mode. Driving inductive loads (motors, relays) is a particular strength.
FEATURES - Convenient, low cost source of double DC voltage from a 6V/12V battery. - Easy outlet box installation in minutes - Powers almost any DC load - Electrically quiet: nil radio interference - Low standby current - Driving inductive loads a particular strength
APPLICATIONS - Operating higher voltage DC appliances from a lower voltage source battery. - LED lighting: Charge higher voltage battery in parallel with lower voltage battery. - Fluorescent and incandescent lighting. - Fans, relays, motors.
DC Voltage Doubler 
With a DC Voltage Doubler, you can power higher voltage fans, lights, and most electronics (including LED lighting) directly from a lower voltage source battery with zero electrical system modification.