It has to do with passage of electrons through openings in the glass mat (I had to simplify this forgive me). Like all things electro-chemical the formula is not linear. But suffice it to say
Charge a depleted AGM slowly over weeks and months
Fail to reach 100% charge over weeks and months
The AGM will throw a Kevorkian Fit.
Toss another reason why the insanely high ampere rechargeability of a Lifeline appeals to me.
But slow and partial recharging is a cumulative degradation. It takes time and the degree of discharge makes all the difference in the world. For instance no AGM could care less if only discharged 40%. Meaning 60% remaining.
But the less than full recharge enters the picture. The longer that insufficient recharge is sustained added to the percentage missing is how that mistreatment is factored.
Perspective
Even 4-5 weeks camping while shortchanging the recharging is not going to kill an AGM. But using a Schmart Charger to recover after you get home is yet another insult to the process. Another Megawatt Moment...
