"I took my MAX4 out to my Army field training and used the magnets to stick it to the side of one of our Humvees to charge. The driver ended up taking off down a tank trail and I thought my MAX4 was history. One of the guys ended up finding it on the ground way down the trail, and not only is it not busted up, it’s still charging and works just like new, none of us could believe it survived! The whole unit was impressed and asked where I got it, definitely would recommend to anyone needing a tough and reliable power source."