Wish you could rapid charge your cell phone, or run a 12V automotive device off a Ryobi battery, well here is a simple design that can print in about 25 minute on a Bambu printer at 100% speed. There is no ‘advanced’ wiring required here, simply some 6-10mm nickel stripping A cigarette / automotive plug adapter for Ryobi 18V batteries. Uses 8mm nickel battery terminal strips for wiring, simply cut strips to size and install on the print and you are good to go. You may wish to add some glue for better security of the terminals, but it isn't required.

Positive Terminal Instructions : Cut a roughly 100mm long strip, feed it up inside the left most hole from the ryobi terminal interior side of the adapter (left most with circle facing upward), feed through some excess and bend into a U shape to feed the strip into the hole next to it (the one off center right). Needle nose plyers or tweezers may help with this. Once the nickel strip is fed back into the return hole, bend over as seen in the photos. Then work backwards to remove any slack, then cut the left over strip slightly past the bottom, again forming a U shape and feed the strip into the securing portion that would supply to the posititve ryobi terminal.

Negative Terminal Instructions: Cut a roughly 100m long strip, feed it from the automotive adapter side in the ‘side hole’, repeat the U forming into the battery terminal negative side. Cut a roughly 75mm long strip, make it into a circle wrapping in on itself, this is for the top negative terminal ring of the cigarette adapter. Place this ring with the negative lead coming through the interior of the ring, then fold over the negative lead to secure/terminate said lead and hold the ring in place, there is a small ‘cut out’ on the interior for the ring to seat itself that is slightly wider than the rest of the interior of the 12V side, just your fingers to work the circular ring to fit as well as possible into said ring position.

Additional Notes: This is designed to be a fairly tight friction fit. Depending on your printer you may need to print the model at 101-103%. Though printing at 100 on my P1P works just fine. I used 10mm nickel stripping myself as I wanted a reasonably wide negative ring, but I'm sure 6mm / 8mm would also work fine. For the two strips that feed ‘though’ acting as the positive / negative terminals, you would likely want to cut the width of the strip down to 6-8mm to make feeding easier.

Anyhow, appreciate any feedback anyone has. Hope this helps, this is my first 3D model I've designed for public use.