Can we add or replace battery of portable charger by ourselves?

Whether can we add or replace battery of portable charger by ourselves is related to the design.

At present, most of the portable chargers are sealed, and the battery is designed in parallel. The battery needs to be matched by the capacitance and then soldered with a professional welding machine. The ordinary users do not have a matching device and cannot divide the battery or Match. Without welding machine, welding is easy to damage the battery. Therefore, it is not recommended to replace the battery by users.

Some of the portable charger such as ENB is independently designed with batteries, with reverse connection protection. The battery does not need to be divided to match, and it can be replaced.

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