[rick-l]

Originally Posted by intakexhaust

Take the guts out of a portable / emergency weather radio with LED flashlight, USB charger, etc. Powered by choice of generator, battery + ac/dc transformer.

Find them $15.

The DW01, the FS8205 and the battery (click the battery data sheet from the Mouser website) are the main parts your after.

DW01 protection circuit https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwi6wOGMnvvMAhWG6CYKHRF-B6oQFggcMAA&url=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2Flear n_tutorials%2F2%2F5%2F1%2FDW01-P_DataSheet_V10.pdf&usg=AFQjCNESLW0teltQjoOZY1_fWnENDIKgug&sig2=VIkgEFUTMehVDmcZRGEtkA&cad=rja



Dual MOSFET https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjqyfSZn_vMAhXLpYMKHffUDXYQFggcMAA&url=http%3A%2F%2Fwww.ic-fortune.com%2Fupload%2FDownload%2FFS8205A-DS-12_EN.pdf&usg=AFQjCNGVY7D-BO_HpylsuyYqepFWqa_95g&sig2=kt1apzIxXGLLise6XZB8wg&bvm=bv.122676328,d.eWE&cad=rja

Of course an estimate of how much power you need and how much is available would help also.