I had this clarified briefly by our supplier. The 6.4 volt 900 mAh battery does not fit the Mini Mario Copter, this is intended for RC vehicles. It doesn't fit in terms of size and is about twice as heavy as the drone itself. According to the supplier, the following battery fits, but I can't find it in our range: "Battery 3.7 Volt 430 mAh 410379"

Hello, what does your existing battery say? If the plug and the 6.40 V are correct, both are possible. With 900mA you can drive a little longer, but the battery is also bigger.

I mean, which model does the battery fit?

According to our information, this would unfortunately not fit. (VW Beetle Carrera Profi RC / 370183019 - Jeep Trailcat Carrera Profi RC / 370183017 Ford F-150 Raptor Carrera Profi RC / 370183012 Lime Star Carrera Profi RC / 370183015 Red Bull NX2 Carrera Prof RC / 370162115 Turnator Super Flex Carrera RC)