Hi Everyone, I have a macwheel MX1 as well. I found a company called Jag35 from a youtube guy that buys and sells these batteries like crazy. A direct replacement battery can be purchased on JAG35, it comes with an XT30 connector that you will have to change to an xt60 connector, other than that they are the same battery. I personally purchased the R5 battery because it has almost twice the capacity, but I am modifying my scooter to accept this battery, I can post updates on the process for anyone interested. Please use my referral code if you find this helpful, the other links are direct links to the site. Good luck, I am happy to answer any questions.
My referral link
36v 10A Battery
cheapest XT60 connectors I can find
no wire xt60-xt30 conversion for anyone that doesn’t want cut and solder