So I added some LED strips to my welding Helmet. Wired 2 18650 laptop batteries in Parallel with a TP4056 charge board, and boost convertor to give me an output of 12v to the LEDS's. Also added an on off switch from old strimmer engine and a charge port for a 5v phone charger with barrel connector. Lights off. Lights on. Switches and charge port.