Can Bosch eBike batteries be repaired?

For safety reasons, faulty, old or "worn out" batteries cannot be repaired or refreshed. Lithium-ion batteries are complex, finely tuned systems with a high energy content. Correct function and optimum interaction with the Battery Management System can no longer be guaranteed if a battery is repaired. In addition, when the battery is re-assembled, the housing seal can no longer be assured. For safety reasons, batteries must pass extensive series tests in accordance with national and international legislation and normative requirements before they can be placed on the market. These series tests are not feasible for an individual repaired battery due to the number of test samples required. This includes, for example, leakage testing, as well as overcharging and short-circuit tests. If these tests are not performed, there is a high risk that e.g. moisture penetrates the battery and, in the worst case, causes a short circuit and thus a hazard. All of this can have safety-relevant consequences. For safety reasons Bosch strongly advises against having batteries repaired.