USB-C 65W Charger compatible with DUAL Ryobi 18v

Updated 05/22/2025

NOTE: There is another version of this adapter, before you print this, check out…

https://www.printables.com/model/448954-usb-c-65w-charger-compatible-with-ryobi-18v

This printable adapter allows dual (or single) Ryobi 18v batteries to power/charge your phone, laptop, or other USB-C / USB device.  Using a 4Ah or larger battery is suggested.  When using 2 batteries the total runtime is increased, ideally both batteries should have the same Ah rating, batteries can also be hot-swapped (one at a time) for uninterrupted power to the load.

Suggested print settings:
 - 0.20mm QUALITY
 - Prusament PETG (pictured using OVERTURE PETG Grass Green)
 - Infill density 20%
 - Infill pattern Cubic
 - 3 Perimeters
 - Supports required

Qty.4 of Keystone 209. 1 Cell Leaf Spring Battery Contact
Qty.2 of 20A 50V Schottky Blocking Diodes
Qty.1 of Anderson Powerpole connector (optional, I also provide files that omit this connector)
Qty.4 of M4-0.7 x 50mm Hex Socket Flat Head Cap Screws are required
Qty.1 of USB-C Charger

** Screw connection is required - do NOT super-glue these parts together…

Insert Qty.4 of Keystone 209. 1 Cell Leaf Spring Battery Contact with wires soldered on at about a 45deg angle (use a MINIMUM of 14 AWG, see the last picture for lengths, allow soldered connections to cool BEFORE inserting!!!)

The batteries are wired in PARALLEL with the diodes on the + wires (pay attention to diode direction indicated by the stripe)

See the last picture for wire lengths, and other pictures for progressive connection steps which make assembly easier.

Safety note: The PowerPole port is designed for 20 to 18V output from the batteries, this can be used to run other loads, or to connect in parallel to another printed USB-C adapter (which can optionally have 2 more batteries installed in it for additional runtime)  I would not combine more than two, for a total of 4 batteries.  Caution: The PowerPole port can be used as an input (12 to 24V acceptable) to power just the USB-C charger by itself - BUT ONLY when NO BATTERIES are plugged into the adapter.  Do NOT attempt to charge batteries in this adapter, charge the 18v batteries individually in approved chargers.  The BMS built into all Ryobi 18v batteries will provide a safe low voltage cut-off.  Use of this adapter is safe when these instructions are followed, but any use is done at your own risk.  Do NOT leave batteries unattended, in direct sunlight, or anywhere near your campfire/cooking stove/open flame, space-heater, or water.

If you need the STLs of these parts, please see:
https://www.printables.com/model/1303958

Don't have a 3D printer yet? That's OK, order already printed from…

https://jpelectron.etsy.com