Hello I did this video to show how it’s easy to connect 2 or 3 or 4 battery on your ebike I’m testing this Device for more than 3 months  and it’s working perfectly and I’m getting more torque and more distance And this device keeps my battery safe I did 45 miles full throttle zero Peddling Usually I get about 16 miles on the 48v and 25 miles on the 52v so it will be 41 miles without the fbc and if you paddle and lower pass I believe it will do about 100 plus miles , this setup connector also works with magicycle and rad ebike and all ebike have xt60

(This kit work with Himiway , rad rover, magicycle and other haidong based ebikes)

Here’s the link for the Device with cables

https://fattirehousela.com/shopnow/p/dual-battery-combiner-gd76t