If you want to remove the charger for your own use, you need to pay attention to safety issues.
First, make sure the power bank is off and there is no battery charge. Then use a screwdriver to remove the shell of the power bank, taking care not to damage the internal circuit board and components. If you need to replace batteries or other components, you can follow the instructions or related video tutorials.
Finally, reassemble the power bank and test it to make sure it works properly. Remember, if you are not sure how to disassemble and reassemble the power bank, it is best to have it done by a professional to avoid damaging the device or causing personal injury.