Electric vehicles renewal
The renewal of the e-bike battery means, that we change the battery cells into newer ones. The old shell, and the electronics won't be changed. Basically that means, it will be a "new" battery. Usually we replace the old cells with new ones that have higher capacity, so the original distance will be even longer!
The electric bicycle or e-bike batteries refurbishment means that the battery cells in the battery pack in replace with new ones. Old outer casing and electronics stay. In fact, a new battery will be out of it. In general, than the original or a new factory capacity and higher performance battery cells are introduced, as a result of increased original mileage!