I had awesome good luck with the old yellow box from Wal-Mart. It was bought new in September of 2004 and worked well until early in 2011 when it started to lose power. It will still start a garden tractor easily but not a totally dead car or pickup. The design is very thin and it will lay under or behind the seat in a standard cab pickup. If I could have had a brand new one like it thats what I would have got. Apparently they don't make that model anymore?
Last fall I upgraded to the black box also from Wal-Mart. it works well but they got super cheap in making it. There is no power cord, just two prongs on the back side so every charge requires an extension cord. Also the leads are very short. It does have overcharge protection so I can leave it plugged in all of the time and it won't cook the battery.
Now if I need a gobb and a bunch of amps I can use my Start-All. It has 300 amps of battery boiling power. Very hard on battery life but will easily spin anything i own - even it it has no battery. It rolls nicely but weighs a ton so if I need it out on the back 40 i have to put it on the caryall or use the pickup with a liftgate. Definately not handy to carry all the time.
Edited by Gtractor, February 09, 2013 - 03:19 PM.