Just a couple notes on your review first...
- The nature of a load tester is a bit different than a "real world" load. I find it very difficult to believe that this small battery resting at 12.5v only dropped to 11.7v with a 70A load applied for 30 sec. That's in the neighborhood of where a legit G31 would be with that sort of load and duration.
- Your holding 13.7v under load is more a testament to how little actual draw you're seeing than battery performance. You're not even getting past your alt if you're holding that sort of voltage.
I'm not poo poo'ing your review. I just don't want people thinking these are magic batteries.
With that said... there is something to be said for using multiple smaller batts vs a single larger one. As in... it's almost always more beneficial for the way we use batts to use multiple smaller ones. And these are just dandy little batteries. You can tuck them any **** where, they're cheap and you can add as funds allow instead of having to drop $300 all at once for a G31.
These are a bit smaller than the venerable Odyssey pc680, but in case you guys don't know... there used to be a class in dB Drag called "Street Max". It was basically an anything goes class but it was limited to a single 800 cubic inch battery in the stock location. B2 Audio set the world record in this class with an idiotic 166dB or so. Yeah... on a single battery. They ran (4) B2 M1mki amps from a single batt. It was a multi cell battery like their B2 "better battery" or the Cactus CS9000.
Why am I talking about all that nonsense? Because if you crack one of those multi cell batts open... you'd find (5) Odyssey pc680.
So yeah... a few of these little buggers can do work.