Two chargers arrived with major dents on the bottom (see pictures I posted). Schumacher ships them without adequate protective packaging. It may be a good charger if you can get an undamaged unit. I'm waiting for the third one now.Update: Third charger arrived without dents and was packed the same way as the first two. The housing is made of thinner metal than the 20+ year old Schumacher that died last month. I did raise the rating from 1 star to 2 stars since I ended up with a good unit after three tries and it works well (big star reduction since it took THREE trys!).