Summary

I made this carrier using some brass knuckles I found online (https://grabcad.com/library/brass-knuckles--1) as I thought it looks cool for a handle and combined it with some guy's makita battery holders.
You need to print two of them and screw them back to back using DIN7981 2.9x6.5 screws.

Print Settings

Printer Brand:

Bambu Lab

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Bambu X1</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.28mm</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>30</p></div></p>

Makita Battery Carrier