What sort of battery charger do you use for keeping your whirly battery topped up ready for use? Can you use motorcycle trickle chargers that also stop the battery getting sulphated when not used regularly?
I tend to use 12 volt car batteries for my machines, so a standard trickle charger does the trick. However, battery life is reduced by constantly topping them up, so don’t expect a battery to last much beyond 50 charges.
Peter uses a car battery for his decoy machines