Q. How does the Starkpower’s lead acid Equivalent "Pb Eqv" capacity (Ah) rating compare to lead-acid Ah ratings
A. Lead-acid batteries used for starting purposes are designed only to provide the maximum current to start your vehicle. Typically lead acid starter batteries can only be discharged about 20%~25% before the plates begin the process of disintegration (sulfating). Any further than that will quickly reduce the total life of the battery, so a lead-acid battery rated for 15Ah has only about 3~3.75Ah of usable capacity.
StarkPower lithium-ion batteries have 1/3 the internal resistance of a similar capacity lead acid battery and they can be safely discharged to 90% DOD. Lead acid internal resistance rises as they are discharged, the actual capacity which can be USED may be as little as 20% of the mfg. rating. Discharge in excess will not only damage the lead-acid battery, it may not allow proper starting as voltage sags. StarkPower’s lithium batteries hold a higher voltage during discharge. A StarkPower lithium-ion battey in a starting application can replace lead acid batteries of 3x the size in Ah. Therefore the Ah(Pb Eqv) is a way of comparing the starting capcity lithium battery can do vs. a lead acid battery. If you have a 12Ah lead acid battery in the vehicle today, you can safely replace it with a 12Ah (Pb Eq) battery from StarkPower for engine starting applications.
