Interesting that 27 amp figure, how they came up with that, and made the battery 0.11 inches less wide :)
Or the marketers saw that the dimensions line up with a BCI group 27 battery and yelled 'Eureka!!!!'
Unless 27 amps somehow instantly brings the battery to 14.7v then twiddling the voltage pot upwards from own low to maintain 27 amps should be the nearly the same dang thing as being able to choose 27 amps max with a top limit constant voltage phase of 14.7v
My Northstar battery would not hold the 13.0v or greater resting voltage, until I did a 50% recharge and a 25 amp recharge to full. It kept maxing out at 12.84, until I did the 50% and 25 amps initial recharge. It wanted that wake up slap across the face.
I actually allowed the batter distributor to talk me into a Discounted older blue top Northstar initially, and it behaved the same way. Needed the 50% and the 25 amps before holding 13+ volts. I wound up returning that battery and the lightweight (57LB) Crown group31 relabelled marine battery which performed horribly on a 50% discharge. Traded it for the 64Lb screwy31 and the blue top for a new Greytop Northstar-27
I think I can hear Mex chuckling in the background.
Be interested to see how amps taper at 14.7v on the Ub121000. Mine eventually drops to zero but I usually drop to float at 0.4a and more recently at 0.3.