That cant be cranking amps.... I know it says so on their company site but that's false advertising... it has to be. CA means to output a particular current rating for 30 seconds straight down to 9.6 or 10.6v, cant remember off hand, at 32F. There's no way there biggest battery, which is 120aH and ...2600CAs can do that at ~80lbs and only $300... The XS D3100 is the largest battery they make and it's got 1,360CAs and 5000MAs. What YOU are reading is the MA reading of the battery, they have it wrong or are incorrectly measuring CA specs. I can tell you that while any 12v batt can be used as a starting batt, only some excel at it. Shuriken and Kinetik have outstanding reserve capability but not so hot quick disbursement of power compared to other companies. Xstatic Batcap and XS Power have xtremely high current discharge capabilities and are superior to starting vehicles. Xstatic batcaps may be better at starting a vehicle, but XS Power batts have longer, LOT LONGER reserve capacity than Batcaps do as Batcaps are primarily focused on quick discharge only and that's not only what u need in a starting battery... For daily use and as a starting battery, XS Power all the way, or a strong enough Shuriken\Kinetik is fine too. They business practices should be slaughtered for stating that on their site. typically, the higher the CA or MA, the more a battery cost. I can get 100aH batts for under $100 but they are terrible for really high MAs... You get another 100aH batt with very high MA rating, the price sky-rockets.