Bought a new battery from Fastfactor. Its LFP, 80V, 27 Ah. It cost 19500, and they modified the bike so it can easily be taken out. I still live in a house, but an apartment is possible in the future. It comes with a new meter that goes from 100 to 0%. https://www.facebook.com/profile.php?id=100057276406792 It has a new charger, it takes 5 hours to charge. There is an app that lets you see the voltage and stuff for each cell in the battery. You can also see the total Amp drawn, at max throttle its 70 A, more than the 64A circuit breaker in the bike, so if you plan to drive at max power for long stretches you should replace the circuit breaker also. First time it died on me after 55 km, and the meter said 18%. I was a bit grumpy after 2 km push bike, but they did come pick up the battery and adjusted the scale so now 0% means empty. Over the years i imagine it will climb up. But that aside the bike is as good as new again.