Possible charger for bank charging..?

Is anybody familiar with the quality of the Schumacher chargers?

I was at Orchard Supply (hardware store chain) this afternoon and looked at the chargers. They carry the Schumacher brand, and Schumacher has a 12v 3A charger that's in a nicely small box. Curiously they also sell a 1.5A charger in the same size box. Anyway it's small enough it could be feasible to strap five of them together to carry on a motorcycle...