My second pack is made of Evercells. These are 83AH 40lb monoblocks, and since I have 22 of them, my whole pack weighs 880 lbs. My car is well within it's factory GVWR, and has a range of between 80 and 120 miles on the freeway, depending on how the car is operated. These Evercels are worth noting especially because when purchased in quanity, they are price equivilant per watthour with Optima yellow tops [high end AGMs].