DIY 18V Makita Bosch USB-C PowerDelivery Supply PowerBank Fast Charging Charger

Fix the toroidal inductor with hot glue so that the adapter can withstand vibrations.

2x USB-C Charger PCB with SW3518 Chip:

https://de.aliexpress.com/item/4000180424469.html

Includes a buck (no boost) converter, so USB-C fast charging works up to 16V DC (not 20V).

18V Makita Battery Adapter:

See my design here https://www.printables.com/model/436132/

18V Bosch Professional Battery Adapter:

See my design here https://www.printables.com/model/427974/

1x Power Switch:

Switch size 21 x 15mm
Front panels cutout 19.4 x 13 mm

https://www.conrad.ch/de/p/tru-components-wippschalter-tc-r13-66a-02-250-v-ac-6-a-1-x-aus-ein-rastend-1-st-1587515.html

4x Countersunk Screw:

M4 x 16mm

Designed in Onshape:

https://cad.onshape.com/documents/a62b52dd01e0ab4bb20cebe0/w/be7d92a55989c1143ceac5c2/e/e764454395d3e82bb2ab2d64?renderMode=0&uiState=641eabe9373c27003b51dca5