RYOBI 18V to 40V Battery Adapter

Ryobi makes several AC Inverters and USB chargers. The 40V battery RYi300BG is nice because it has a 300W Pure Sine wave inverter, a USB Type C port 5/9/12/20 VDC rated at 2A, and a USB type A port rated at 3A. The only down-side is that I have a ton of 18V batteries and don't really want to purchase another $100+ battery. So I designed an adapter plate, battery carrier, and 18V battery connectors. I only have the one Ryobi 40V tool, so I haven't tested it on the other 40V tools. You should use two of the same Ah size batteries. I used the strap buckle design from: https://www.thingiverse.com/thing:281... I've loaded the 3D printer files to: https://www.prusaprinters.org/prints/... https://www.thingiverse.com/thing:461... Here are the parts: Ryobi RYi150BG ( https://amzn.to/3nbuQWk ) Ryobi RYi300BG ( https://amzn.to/2Gxiwyw ) Ryobi P743 ( https://amzn.to/3iiOfB3 ) Ryobi 40V 6Ah Battery ( https://amzn.to/3l3xThl ) Ryobi 18V 4Ah Battery ( https://amzn.to/33mjNS5 ) Wire Crimper ( https://amzn.to/3igwTog ) Wire Stripper ( https://amzn.to/33lQak4 ) 10AWG Stranded Silicon Wire ( https://amzn.to/36q6BgU ) 3/4" webbing strap ( https://amzn.to/3ig0sX6 ) Ryobi 18V contacts ( https://www.partswarehouse.com/Ryobi-... ) FTC Disclaimer: We may earn commissions for purchases made through the links below. As Amazon Associates we earn from qualifying purchases.