Naio, In june 2015, for a project for a friend, i had a Lifeline GPL-31XT delivered to me fresh from the factory in West Covina. It read 12.99v, and I hooked it upto the meanwell at 14.4v, and many hours later Amps seemed to stop tapering at 0.9a or something( working from memory here). The point is the amps stopped tapering before the requisite 0.625 amps was attained.
I gave up trying to get amps to taper to 0.625( 125Ah capacity battery)
I then was using it, and removed some 35Ah from it, then recharged it on the meanwell set to 14.4v, and this time the amps did taper to 0.625, and kept tapering.
After this initial shallow cycle and recharge, the surface charge refused to dissipate staying at 13.23v for a few days I wound up removing about 5AH and the voltage rebounded upto 13.16v and stayed there for days.
This was my second observation of an AGM behaving subpar until it got a discharge then recharged, being quickly brough to absorption voltage with 40 amps available.
Both AGM batteries that i had observed since new, seemed to require the initial discharge cycle before they started performing well.
We often hear how deep cycle batteries do not deliver their rated capacity until they deliver a 20 to 50 cycles.
Perhaps with AGMS they require a single deep cycle promptly followed by a higher amperage recharge to full before they too cooperate to expectations.
Anyway I will be doing this to any AGM battery, but especially one which is supposed to be an engine starter only. I am going to cycle it deep, and promptly high amp recharge it.
It would likely be 'just fine' without it, but I like to have a good known starting point for later comparison, and they seem lazy off of the factory floor, and need a smack across their bottom, IMO.
