I would generally disagree with that today....since new formulations have been developed which throw those calculations off. And of course, there is a world of difference in construction of plates, separators and connectors which makes a difference in on the road performance vs. on a lab table. Just a quick example:
Deka Marine Master True Deep Cycle=53lbs.
Interstate DUAL Purpose (no 20 hour rating!) = 53lbs
While it may be true that the Trojans are a bit better than the Dekas...there is no way that the Interstates are the Deka's equal even though they are sold as Deep Cycle...they are dual purpose and have thinner plates but more of them!
BTW...Interstate makes NO deep cycles other than the golf cart 6v's .
2015 Georgetown 280DS
2014 Vespa LX150 2014 StellaAuto 125