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I purchased these devices to charge cell phones in a car. To do this you must use a device called a buck converter to supply 5 volts to the device, or use the existing mini USB input. When using the buck converter, you must bypass the momentary switch with the power and secure the nearby ground, so you will need a bit of electronics knowledge. I also relocated the lcd screen, which takes some ribbon cable and some good soldering skills. the white led was removed, and the unit was mounted in the dash with the usb ports and the screen facing out from the dash. The Bat+ and bat- connections were not used as their purpose is to charge batteries. It takes a fair amount of work, but for my project...and the price, it works perfectly.
Verified purchase: Yes | Condition: New
Es perfecto para un banco de alimentacion 5 votios hasta dos amperes.
Verified purchase: Yes | Condition: New