Review on Schumacher DSR108 450A Batteryless Starter by Richard Summerall

My job includes helping motorists who are in trouble. I have a lot of experience with jump machines. I am familiar with this vaulting box and am very interested in it because of its advantages over the normal vaulting box. I don't like loading up my jump box and leaving it fully loaded in the trunk in the FL heat waiting for it to explode. This product makes more sense for most people. I have attempted to jump onto 2 separate 4 cylinder cars on 2 separate occasions. In both cases the voltage stayed at about 11 volts. In both cases I switched the charger to a separate running vehicle to attempt to charge this product. This product also does not charge above 11 volts. Both times the stalled car would not start. I then jumped onto both cars with normal jump boxes. This product is waste of money. I really wanted it to work, but it didn't.