Hello kanqkhaos,
if you open the battery and remove each cells discover which one/s are faulty using the digital multimeter, and then replace these with same rating 18650 protected, it will work again. Only use protected batteries otherwise you will get fire.
If you usb is not driver related but is hardware faulty, like port, joints, it can be fixed joint or replace port. Ports are a common/routine repair done for laptops and phones.
if you open the battery and remove each cells discover which one/s are faulty using the digital multimeter, and then replace these with same rating 18650 protected, it will work again. Only use protected batteries otherwise you will get fire.
If you usb is not driver related but is hardware faulty, like port, joints, it can be fixed joint or replace port. Ports are a common/routine repair done for laptops and phones.