This battery has really impressed me, that's NOT an easy feat cosidering I'm an avid fisherman and have 2 boats that have 36 volt trolling motor systems, so I've had my share of deep cycle/marine/RV batteries over the years. I was using a brand by the name of Trolling Thunder under the hood of my truck for years as it was the first AGM style battery that I tried and really liked. Optima batteries are over-hyped and not worth 1/2 their price IMO. These Kinetic batteries are just plain awesome!! For a battery this small to be packing 1400 ca and 1000 cca is unbelieveble! To get that power you usually need atleast a group 27 if not a group 31 battery, these are actually smaller and lighter than than a group 24 but last just as long as any group 31 I have owned. I'm actually going to replace the batteries in my river boats trolling motor set up when the current batteries die, as a guide I'm allways looking for an edge over my competition and if I can offer my clients and extra hour or so on the water due to these batteries they are worth every penny. Also, The system in my truck is 1900watts RMS, I have one of these 1400 batteries, a 175 amp alternator, and 10 Farad Rockford Fosgate Hybrid capacitor running through 0 gauge Sweetwires wire, my lights never dim and the voltage rarely seems to drop below 13.4 volts.