I recently bought the Amptron 100Ah Slimline Lithium battery, which is an underrated 125Ah battery! After researching AGM vs Lithium, most specified 2000 charge cycles if you don’t exceed 80% Depth of Discharge (DoD), while Amptron offered 2000 charge cycles with 100% DoD! That means Amptron is either significantly better tech or the battery is a 125Ah which with standard 80% DoD giving a usable 100Ah. The service from the AMPTRON team is great and provides in-depth information. They even researched the DCDC charger to  help select the right settings. I highly recommend AMPTRON, their product is excellent and the service exceptional. Keep up the great work!!!?