I have just purchased an ezeecadence with two faulty batteries. I took both sets of bateries out of the plastic case testing them for voltage and amperage picking the best 10 cells to make one battery this has had vrery limited success,from two dead batteries the " new" one wil ltake me 4 miles having a spare bms and a case i want to recell the second battery but i am having great difficulty finding cells or battery pack that will fit inside the plastic case Any help gratfully received. While i am on how do lights work is there a switch? Batteries have a sticker 08-10-05 one case siver with 50 cycle sticker one red with no sticker lithium ion cells x 10 at 3.6 volt 10 ah