The M24Pro Suspension Off-road Electric Skateboard is VERY hungry and yes, without the additional battery on top I only managed 22km (with my riding style – always full throttle at the highest level).
I managed 65km once and 75km once (unfortunately without proof) with it (depending on the type of tire and weather conditions).
The fact that I couldn’t go on after 52km this time was also due to the temperature being over 30 degrees Celsius and it was right after work – there wasn’t much energy left.
I also rode the 52km with a short cigarette break. 29km, then the break and another 23km – in between without getting off and always at maximum speed – depending on the surface.
–Mark Rockshock