December 16, 2009 | Posted in 
Why are XS Power Lithium Powerpacks for automotive use not rated in cranking amps?
The simple answer is because you cannot safely extract energy that fast from any lithium-ion battery on the market today (even if some competitors claim a crank amp rating.) Sustained high rate discharges from lithium-ion batteries will cause dangerous electrolyte venting and explosive fires. After such an uncontrolled high rate discharge permanent damage is done to the individual cells. This is a characteristic of the Lithium-ion cell’s chemistry and has been confirmed with our in-house Firing Circuits battery tester.
Well, will it start my car? Yes! XS Power Lithium Powerpacks can discharge high currents for short bursts and can easily handle a modern cranking sequence. For instance, XS Power Lr48 batteries have started large V8 engines with high compression rates and sizes up to 932 cu. in. In fact each XS Power Lithium battery goes through a complete test regimen that includes high rate discharging, charging, and sustained loads for several cycles before it is shipped.
