12 of 15 people found the following review helpful.

GB 40 Review

Saw this at my Subaru dealer and my service rep was touting its ability. I decideded i needed this. Found it at AutoZone. I have used it twice on my John Deere mower. Battery completely dead both times. Second time battery was dead and the. unit was also out of fuel. It took quite a bit of cranking to prime the carburetor and start the machine. Still had better than a half charge. This is the real deal !! I am considering a second one to have one in each vehicle. NOCO offered the GB 40 for 75$ before Christmas and if I see it for that price I will purchase a second one. This is a great ace to have up your sleeve. There is also a great video on YouTube showing real time use where a mechanic started 6 vehicles in below zero temps. All vehicles had dead batteries and we're sitting extended periods of time. Worth the watch to do some easy research.

Yes, I recommend this product.