Hello, I have a Qantya evo 1 2011 with all original parts, the problem is that the battery is damaged as far as I understand, or 2 damaged cells and I think they are somewhere around 800 euros, I don't know exactly, I was also informed that if I replace them it is possible for these 2 others to break, I'm thinking of getting another battery but I don't know what I need and where to buy all the components for the battery. One component that gives me problems is an 8.4 KW BMS, I don't know why where to buy it, the battery is 40Ah and 48V, I really want to bring this back to life. If you can give me all the components in detail and where to buy, I would be grateful for this battery. I also left some pictures of the battery. Thank you!