AGM Impedence And Heating When Charging

[MEXICOWANDERER]

I let this sit cooking for over a month and no one offered to answer LY or PT's questions re: heating when left at a saturated voltage maximum left on for days and days.

No one brought up the correlation between internal impedance and heating.

The issue is this to clarify. Achieving 100% charged especially when camping but still important when a power pole is available. I am at the moment using a watt-hour meter and an adjustable watt-hour discharge to test my 11-year-old Lifeline. It determines the capacity loss.

The cheapest son of a gun on planet earth is not me. But trust me, I'm in the top 100.

When I over-amped the Lifeline, it simply resisted better than anything I ever tried. Yeah, better than an Odyssey and better than (a borrowed) full river that was 2 months young.

If you use impedance testing on telecommunications batteries you'll find they have a higher impedance as well. They excel at doing their job their way.

This answers someone else's question why their battery heats up if left for hours and hours (days?) at 14.4 volts. This is an utterly moot point when a shutoff timer is used. But it is an interesting point that you yourself can answer.

The Lifeline does NOT heat up anywhere near as much and now you know why.

And with as much as three times, the plate thickness PLUS thicker paste the Lifeline should stand on its merits.

The Lifeline loves charging inrushes of 5 times its amp-hour rating
and here is something I have held in reserve for years...

Charge Efficiency Factor...

Discharge 100 amps and how many amp hours does it take to refill it?

CEF comparisons are a nasty subject around many companies except perhaps for Concorde and Rolls & Surrette. CEF is the meanest and most unforgiving performance comparison between batteries.

Yet, the Lifeline demands not asks that the 20% of amp-hour capacity law be obeyed and that the partially charged laws be obeyed.

An AGM battery is NO MORE susceptible to undercharge loss of capacity than a flooded battery is to permanent sulfation. That notion is absurd. The reality is what forces a recovery process in an AGM destroys a flooded battery.

A wise medical doctor down here rescued me from septicemia. Years-long UTI turned into a whole-body infection. Scripps Medical Center missed it three times and it took a course of Vancomycin (last-ditch backup) then 3 other drugs to reverse the tide, (this is the result of listening to incompetent morons). Mexican doctors missed it too. It took an internal medicine specialist to add up all the alarming signs including near-paralysis fatigue and fever. The exhaustion was mental as well. This is scary stuff. Enough. Chew on what I wrote above.

[RJsfishin]

Oh my God !! What would we do w/o all this wealth of such valuable information. And all for the sole purpose of seeking attention !!

[MEXICOWANDERER]

Exactly the opposite sir.

Like taking a standard transistor and comparing it to a MOSFET. The forward voltage drop vf of a MOSFET is minuscule. Hence a stunning reduction in heating.

Concorde was able to do this because of its sales of tens of millions of AGM batteries to the military and government. Just one computer single laser robot machine that I saw must have been priced at a cost that would drive a person to their knees. in the millions of dollars.

Uniformity and repeatability of plate paste preparation is an unforgiving manual operation. x number of minutes to formulate transport, apply and set. And the recipe has to be dead on. Paste application has to be absolutely perfect. The structural grids have to b'e acceptable. Concorde uses SILVER in its grids. Solely because no other alloy metal bonds paste to grid as well.

Battery metallurgy is quirky

Concords' formula allows for ion passage emphasizing inrush rather than discharge. That's why the Lifeline allows 5c inrush yet is surprisingly modest in its CCA ratings.

Expensive glass mat holds more electrolyte and allows more circulation. This is why they can use far thinner matting and with computer laser aligning plates it allows for plates that are 200% as thick.

Think Harbor Freight diagonal cutting pliers versus Wiha.

Nothing on the face of the earth can substitute for twice as thick plates.

"Yeah but the Lifeline is no different than cheaper AGM batteries when it comes to maintenance"

Very true just like parking by ear is not recommended for a Ford Pinto or a Rolls Royce.

[pianotuna]

Hi Mex,

Are you saying the lifeline is high impedance?

As always, thanks for the information.