The battery won't spin and lose all charge, it has a breaker mechanism that will stop it similar to how seatbelts work, it gets stuck if it pulls too hard. This

The battery won't spin and lose all charge, it has a breaker mechanism that will stop it similar to how seatbelts work, it gets stuck if it pulls too hard. This is to prevent damaging a circuit if you forget resistors. Of course this is a model of how electricity should work, but it is still useful and they document the differences from "real" electricity decently in the books. In any case its a super fun toy and I highly recommend getting it!