Wurkkos Fc12 With 18350 Sofirn Tube Not Charging

Hi folks.

Got a Wurkos Fc12 with a Sofirn 28350 tube.

Light works perfectly, except won't charge.

It charges with the 18650 tube.

On the 18350 the red and green light flash for 30 secs then the go out.

weird no idea… tryied other cables ?

What make and model battery are you trying to use and what is the voltage currently on that battery? Button/flat? And does the indicator light work with that battery when you first turn it on? Not charging.

Battery fully charged externally.

Tried Shokli, EXO, Vapcell.

Tried different cables, just flashes red and green.

Put 18650 tube and any cell works spot on.