Originally Posted by CJ18
Better reserve capacity than the D3100s. These are made for the daily driver. If you need instant discharge for burps, then the D series are what you want.
Actually they don't have better reserve then the d3100. These are made to supplement the system. The d3100 have slightly higher discharge curreny as well as reserve. From my understanding the xp series has fewer plates per cell along with a couple other weight saving things.
Nate says the XP are not designed to be the main starting battery but to be used by people having large banks of batteries.