Re: MotoLectric Starter Cable upgrade - what a difference!
Posted: Sun Jun 12, 2011 3:37 am
Dekka is a glass mat type battery, no gel
All AGM batteries have enhancements over flooded lead acid batteries:
Purer lead in the plates, as each plate no longer needs to support its own weight, due to the sandwich construction with AGM matting. Traditional cells must support their own weight in the bath of acid.
Fluid retention - un-spillable
High specific power or power density, holding roughly 1.5x the AH capacity of flooded batteries due to purer lead[citation needed]
Low internal resistance allowing them to be charged and discharged quite rapidly
Water conservation - never requires addition of water
Acid encapsulation in the matting
Operation well below 0°F or -18 °C.
Availability of UL, DOT, CE, Coast Guard, and Mil-Spec approved types
Vibration resistance due to the sandwich construction.
[edit] Disadvantages
Cost. AGM automobile batteries for example, are typically about twice the price of flooded-cell batteries in a given BCI size group.
AGM batteries have up to a 10 year lifespan. For an AGM battery, the depth of discharge for optimal performance is up to 80% but flooded batteries can only be rated up to 50% depth of discharge.
AGM batteries do not tolerate overcharging. Overcharging dissociates the water in the electrolyte, which is unable to be replaced, leading to premature failure.
