18500 Li-Ion Battery Holder for charging Frsky X-lite

Well when you got a printer, you can print instead of buying a new one!

You'll need 4mm screw and nut for this. and thin nickel or metal plate to join them in parallel or series

Printer i used to print this
https://www.banggood.com/DIY-Creality-CR-10-3D-Printer-300300400mm-Printing-Size-1_75mm-0_4mm-Nozzle-p-1085645.html?p=DG23031123036201501P