When my super duper Wal-Mart toad battery did the Johnson Controls death knell, I didn't freak out when I had to settle for a featherweight calcium calcium Mexican battery.
Warm temps CCA does not enter into the picture
My habits do not include the slightest cycling of a car battery
Gear reduction starter further lessening cranking amp load
Minimal parasitic draw of 3 milliamps. (Cycling is death to a calcium calcium battery).
And it's been 5 years...
So all aspects need to be covered when analyzing what type of battery, how many and what type of recharge systems fits like a glove.
Power pole princess applications where a rig jumps from park to park may even successfully get away with a no-cycle engine starting battery. And with no cycling that engine starting battery may far outlive a deep cycle battery.
Many small rigs have very limited space for adding batteries.
But small rigs = small demand and small loads.
If the original battery seemed to do a good job and did not fail prematurely then what's to gain by futzing with the formula?
It's the 51 weeks off-season that concern me. If the original converter halfass charges the battery with the generator and no capacity complaints are noted, what value does a whiz bang dongle special have 51 weeks of the year?
Are not those battery buddies sophisticated and have temp compensation? Useful for 51 of the 52 week year?
There are times to pour-on-the-coal when matching equipment to duty requirements. Big sophisticated charger, thick plate high amp hour battery bank, and meticulous monitoring. But this is not one of those times.