I apologize if this is the wrong forum to ask this ...
I built an electric skateboard for my son with parts form a little Chinese scooter. It works great - for about 30 seconds and then the power cuts out and I am clueless as to why. Perhaps I wired something wrong..
The battery is a second hand LIFEPo4 24V 30ah from VPower. It is one of those duct tape specials. Originally it was the size of a cement block. I was able to unwrap it and open it like a book. I split it into 2 halves and reconnected it so it would fit under the mountain board. It came with a BMS that is still connected. My DMM reads 25.8 volts. When I connect the smart charger to it - it always reads full - or at least the green light stays on.
The 24v thumb throttle ($10 from ebay) has a led power meter on it and seems to work fine. It reads full power until it cuts out.
The motor ( my1016) and controller (xrk2000-24 G) I took from the old scooter. Most all the extra wires from the controller - like to brake, signal lights and stuff - are still connected but taped off to prevent shorts. I may remove most of them once I'm more confident that it won't screw something else up.
It is possible I bought a bad battery, but don't know how to test it. I would really appreciate any suggestions. I'm a novice to this stuff.