I live in an area where there are very large numbers of off-road vehicles... 4x4 golf cart looking4 wheelers... jeeps and hummers (they had an even here several years ago that had 5000 hummers.
The majority of the jeep types and hummers use the Optima AGM's (Jumbo'd failure is the only one that I have personally heard of failing like he reports)
They are the hardiest of all batteries.
The off roaders like the optimas because they are so hardy... they are absorbed Glss mat... spiral would... they layers won't seperate no matter how much thery get banged arournd. This also the reason they look like a 6 pack of coka cola... it is also the reason that the Optimas have about 25% less capacity.
