In order to solve don't charge, Here are some tips for you.
1. Battery cannot be charged under low voltage.
2.Charge in time when the battery is still some electric. Don't wait to until the battery is run out.
3. Don‘t use airbrush kit while charging.
The airbrush kit need to charge after continuous use for one hour.
When charging, the airbrush kit lights up red. When full, it lights up green.
4.Be sure there is no water in air compressor, otherwise it will not work due to the short circuit.