My GP80 starts with a strange noise. After some 10 seconds it automatically goes off. You can repeat the whole procedure all the time. Hence, I dont believe this is a problem with the battery. Do you have an idea what could be wrong?
As far as I can see this is just a plain 18650 lipo with some stupid proprietary pins on the terminals that allows the seller to triple the price. Annoying...
The dimensions of the battery looks smaller than a 18650. Looks more like a AA battery with the pins. Honestly if you find a similar battery you can make your own tab. Iv fixed a Er1511 with a NiMH AA battery and a copper homemade tab.