Electrical needle destroyers are rendered useless during power failure.Electrical needle destroyers can not be used while on move in Ambulances or during field activities like Medical Camps etc.Due to presence of liquids in syringes most of the electrical needle destroyers are prone to electric shocks & short circuits etc.In electrical Needle destroyers user has to first destroy the needle and then cut the syringe hub separately.fter use the cut needles and syringe hubs are required to be transferred to sharp containers for disposal and the same is very risky.