Uploaded June 2021 | Updated September 2026, 13 hours ago
I've got a ton of RYOBI 18V tools and batteries. When RYOBI came out with their 40V tools, I started making 18V to 40V adapters. Now that I have a couple of 40V batteries, I thought I'd make a 40V to 18V adapter. It looks like something out of Sci-Fi movie, but it works (At least for tools that draw less than 10A). Because of the weight of the 40V batteries and the DC-DC converters, I wouldn't suggest this for tools that you swing around. I'm not sure the tools interface will hold up.
The 3D printer model for the 40V battery adapter can be found at:
* prusaprinters.org/prints/61098-ryobi-40v-pass-thru-charging-adapters
* thingiverse.com/thing:4803942
Items used:
* old RYOBI 4Ah 18V battery out of recycle bin
* electrical junction box ( homedepot.com/p/Carlon-2-Gang-20-cu-in-Blue-ENT-Switch-and-Outlet-Box-A521DE-CARR/100113827 )
* 48V to 24V 10A DC-DC converter ( amzn.to/3gNOsx6 )
* 24V to 19V 10A DC-DC converter ( amzn.to/2SiBTlk )
* 12AWG silicone copper wire ( amzn.to/3iZMRY1 )
* 3/4 clamp connectors ( amzn.to/3cYTbev )
* 8-32 1/2 inch machine screws ( amzn.to/3d0osxp )
* wire stripper ( amzn.to/30LCBbE )
* wire terminal crimper ( amzn.to/3lrpq7Y )
* security torx drivers ( amzn.to/2GLxa5y )
* Ace Male Disconnect 12-10AWG ( amzn.to/3dmuiK3 )
* Ace Female Disconnect 12-10AWG ( amzn.to/3zNQJRP )
FTC Disclaimer:
We may earn commissions for purchases made through the links below.
As Amazon Associates we earn from qualifying purchases.
I've got a ton of RYOBI 18V tools and batteries. When RYOBI came out with their 40V tools, I started making 18V to 40V adapters. Now that I have a couple of 40V batteries, I thought I'd make a 40V to 18V adapter. It looks like something out of Sci-Fi movie, but it works (At least for tools that draw less than 10A). Because of the weight of the 40V batteries and the DC-DC converters, I wouldn't suggest this for tools that you swing around. I'm not sure the tools interface will hold up.
The 3D printer model for the 40V battery adapter can be found at:
* prusaprinters.org/prints/61098-ryobi-40v-pass-thru-charging-adapters
* thingiverse.com/thing:4803942
Items used:
* old RYOBI 4Ah 18V battery out of recycle bin
* electrical junction box ( homedepot.com/p/Carlon-2-Gang-20-cu-in-Blue-ENT-Switch-and-Outlet-Box-A521DE-CARR/100113827 )
* 48V to 24V 10A DC-DC converter ( amzn.to/3gNOsx6 )
* 24V to 19V 10A DC-DC converter ( amzn.to/2SiBTlk )
* 12AWG silicone copper wire ( amzn.to/3iZMRY1 )
* 3/4 clamp connectors ( amzn.to/3cYTbev )
* 8-32 1/2 inch machine screws ( amzn.to/3d0osxp )
* wire stripper ( amzn.to/30LCBbE )
* wire terminal crimper ( amzn.to/3lrpq7Y )
* security torx drivers ( amzn.to/2GLxa5y )
* Ace Male Disconnect 12-10AWG ( amzn.to/3dmuiK3 )
* Ace Female Disconnect 12-10AWG ( amzn.to/3zNQJRP )
FTC Disclaimer:
We may earn commissions for purchases made through the links below.
As Amazon Associates we earn from qualifying purchases.
