48V 30Ah Universal Power Pack 40A BMS & Waterproof PVC Case | XT60/T-Plug Ready | 200-1500W Systems Support

I don't have the same bike but similar. you just need to match voltages.https://www.amazon.com/RANSYRI-Universal-Battery-Waterproof-200-1500W/dp/B0F1CTBXW9/This would work, you would probably want a battery balancer if you want to hook them up at the same time.https://www.amazon.com/Etersec-Discharge-Converter-Compatible-Parallel/dp/B0FRF2D3SY/If this bike uses XT60 connectors, its super easy. No splicing or soldering required.