I didn't think the OEM battery was AGM. And while I can agree that a pulsating 13.5vdc from a set of jumper cables may not be good for an AGM, in my experience it doesn't immediately destroy it.
One could say you've already had a negative impact on the lifespan of the battery by running it down as you have.
Though now you have me wondering if that problem could be resolved by filtering it through the voltage regulator or if it'd just burn it out. Sorry I only know enough about electrical components to get me into trouble apparently, not enough to resolve problems.
jump starting will not hurt the battery, as the duration is too short.
I've done it so often, before I got the charger.
No negative impact on my dead battery, as it never was dead for a long time.
If neglected for a long time, it will start to form a sulfate coat on the electrode, which will make the recovery somewhat hard attain, but possible.
here is the charging program as copied from
http://www.tecmate.com/optimate4_detail.php for your info......
The automatic multi stage program engages as soon as the OptiMate is connected to a 12V battery that has at least 2V :-
1- The OptiMate 4 immediately checks if the battery has enough voltage to start the program, and whether the battery is deep-discharged ("sulfated") or not.
2- For neglected batteries, the OptiMate 4 starts the recovery mode, initially limiting the applied voltage at 16V, and if necessary for sulfated batteries, engaging TURBO recovery at a voltage of up to 22V** at low current for up to 2 hours, to recover the battery to a condition in which it can accept a normal charge.
3- As soon as the circuit detects that this point has been reached (immediately for most batteries), the “bulk charge” mode engages and delivers current at a constant rate of 0,8A to charge the battery.
4- When the battery-sensing circuit observes that charge progress is sufficient, the unique ‘verification’ stage engages. The voltage is limited at a lower level, & if sensed necessary, a voltage pulsing action provides further desulfating & tops off the charge. When this has been verified, or if after 48 hours from connection the battery has been unable to accept & retain adequate charge, the next stage engages.
5- The OptiMate then stops current to the battery for 30 minutes while it monitors the unsupported battery voltage to check whether the battery can retain sufficient charge to crank an engine, before the long term maintenance and test cycle begins.
6-During the next 30 minutes the OptiMate offers the battery a supporting & maintaining charge, but only to the extent necessary to counter any losses or connected loads such as an electronic alarm or immobilizer. Overcharging and/or overheating of the battery is ruled out by this 50% duty cycle as the battery is interactively maintained for 30 minutes and then rests during the power drain tests of each alternative 30 minutes. So the battery is always 100% good to go, but never overcharged.
