My old battery finally got some water in it and shorted this morning (as far as I can tell, haven't opened it up).

I can buy a new battery from FTH Power that is the exact same Hailong case and plug, with probably better cells than what I had currently. That way it will just plug and play into my current set-up and I won't have to do any re-wiring. My old battery came with the kit I bought off Aliexpress, so who knows what cells they actually used. Anyone else bought a battery from FTH Power before, and what was your impression?

Looking to purchase today or tomorrow, since I use my bike as a daily commuter and errand bike. Car broke down a couple years ago and decided to go fully e-bike.