If your battery it´s damaged or autonomy its poor, we can do a new cell pack in your old case, to bring a second life to your original bike battery, if it´s possible, in the same case we can do a larger capacity battery pack than original, extending range of km per charge. We only do battery packs with high quality branded cells, such as Samsung and Panasonic, these are cells of high quality and long life to get the best performance.