Amp Hour capacity in LiFePO4 batteries and how important it is to properly size a lithium battery.
PB/EQ is most lithium battery mfg's attempt to capitalize on Lithium battery's ability to discharge at huge rates. without diving into all the technical reasons why this is so and putting most eyeballs to sleep in the process.
this video by Joel Wiseman, one of the most knowledgeable BMW tech's on Adv.
shows what happens when a LiFePO4 battery is undersized as compared to AGM batteries that are correctly sized.