another source for agm batteries

landyacht318 wrote:
I am still AGM shopping. Was seriously considering the Deka Intimidator/ Sears DiehardGoldAGM group 65 until I saw the max charging voltage of 14.6. My Vehicle will do 14.7 and occasionally higher, though usually short lived.

Constant under- or overcharging will damage any battery and shorten its life! Use a good constant potential, voltage-regulated charger. Charge to at least 14.4 volts but no more than 14.6 volts at 68°F (20°C). The open circuit voltage of a fully charged 12-volt AGM battery is 12.8V at 68°F (20°C). As the battery charges, the building internal pressure (voltage) causes resistance to the charge. Therefore, the on-charge voltage must be higher (at least 14.2V) to overcome this internal pressure (voltage) during charging.

Now back leaning toward the DHPlatinum/Odyssey that lists 14.8v, for more CCA a few more A/h, and a bigger wallet hit.

Noticed my nearest battery distributor carries US Battery AGM. They have 27's slightly smaller than my current flooded crowns. Will call and check prices manana

That's a strange quote. Usually they base everything on 80F or 25C. If max at 20C is 14.6v it is less at 25C.

What is a constant potential charger? Is that like my constant current charger in Bulk, where charger voltage stays ahead of battery voltage as battery voltage climbs to maintain the "spread"? You only want constant voltage for the Absorption stage, so I don't know where along they mean "voltage regulated."