Adaptor for Einhell battery to Makita tools

The adaptor is used for Makita tool together with Einhell batteries. The adaptor features also the locking elements integrated in the parts.

I tested the functionality of the adaptor on the impact drill from Onevan which supports Makita batteries, you can find the link bellow:

https://www.aliexpress.com/item/1005004379655202.html?spm=a2g0o.order_list.order_list_main.56.61091802F0QsMz

For the complete assembly of the adaptor you will need the following additional parts:

• 4pcs M3X8 plastic screws (or similar size)

https://www.aliexpress.com/item/1005003576244356.html?spm=a2g0o.productlist.main.103.30256749wtEdCt&algo_pvid=b7088cb2-2dd5-4d89-9795-09866061bdbd&algo_exp_id=b7088cb2-2dd5-4d89-9795-09866061bdbd-51&pdp_npi=4%40dis%21RON%217.69%215.02%21%21%211.64%211.07%21%402103135817064460444903058e8240%2112000026347633715%21sea%21RO%21761304683%21&curPageLogUid=ed5jDcGJVSJT&utparam-url=scene%3Asearch%7Cquery_from%3A

• 2pcs spade terminal

https://www.aliexpress.com/item/32839880068.html?spm=a2g0o.order_list.order_list_main.82.52de1802T2hlz8

• 2pcs fuse receptacles

https://www.aliexpress.com/item/32857322648.html?spm=a2g0o.order_list.order_list_main.83.52de1802T2hlz8

• 2pcs of wire 2.5mm2 (14 AWG) with a length of ~80mm each (do not use thinner wires, it will heat up and melt the plastic)

Assembly steps:

1. Crimp or solder the spade terminals to one of the wire ends;
2. Use glue/hot glue to fix both terminals to the Einhell 3D printed half of the adaptor. Make sure to check if it fits to the battery;
3. Mount the Makita 3D printed half to you tool and position the fuse receptacles inside, apply solder only to the receptacles;
4. Position the two parts on top of each and cut the wire to size so that you will be able to close the parts;
5. Solder the wires to the receptacles, it is important to keep the polarity of the terminals in mind;
6. With the adaptor mounted on the tool, apply hot glue on the fuse receptacles to keep them in place;
7. In the end you should be able to fix the two parts together with 4 screws or alternatively you can use glue.

Do not use this adaptor for charging the batteries.

Let me know you impression for this print :)

The adaptor is printed in two parts with minimum support structures. I recommend to use PETG filament, PLA can also be used but is might crack in time. The design is made for nozzle diameters up to 0.6mm. (0.2 mm layer height is recommended with 60% infill) .