A little upgrade for my Banggood UFO copter. took an 18650 battery and soldered a connector directly to it. Replaced the little 10 gram stick of gum battery that was blowing up like a balloon. Had to remove the landing gear and body and camera but hey it flies! Might fly with the stuff attached. I replaced a boom at the same time so it was probably the floppy motor that had it grounded. And I seriously doubt that old battery was better than 300 mah. Anyway it's a heck of an improvement and it plugs into the same charger too! Wear safety glasses and take all necessary precautions when soldering to anything, especially gigantic batteries!!!