18650 battery on a FlySky GT3C


Well-known member
My gt3c eats a lot of battery. They come with a 800mah 3.7v lipo battery but goes fast. Thought in putting a 18650 battery. They are affordable and seem to do the trick. Got a 5000mah.

The problem is that the original battery has 2 contacts that go against 4 contacts on the radio and from there, 3 wires go to the board

I've connected + and - on the corresponding places in the battery. Turned on the radio, the screen didn't lighted up and smoke came out from the board. Fortunately, the radio still works with the original battery.

What I've did wrong?