DC3
Well-known member
My 2 year old DieHard Platinum AGM battery was stone cold dead when I tried to start the Vette today. I had put a small capacitor across the alternator to end some whine in the stereo and the capacitor failed last weekend while cruising around. I could tell the whine was back when I pulled into the garage just before I shut it down. Haven't driven it since until trying today. Figure the capacitor must have shorted and caused the battery drain.
The drain was so deep the battery just would not take a charge. While pondering what to do, I did a quick search of the internet and came across this article from Hot Rod Magazine: http://www.hotrod.com/techarticles/general/hrdp_1009_how_to_charge_a_agm_battery/viewall.html
The article said the trick is to put a second good battery in parallel with the battery that won't take a charge. That tricks the charger into thinking the battery is good enough to take a charge. Apparently many chargers won't try to charge a battery if the voltage is too low and adding the 2nd battery bumps the voltage up enough to where the charger thinks everything is okay. Anyway, it worked like a charm and I am back in business with a fully charged battery.
DC
The drain was so deep the battery just would not take a charge. While pondering what to do, I did a quick search of the internet and came across this article from Hot Rod Magazine: http://www.hotrod.com/techarticles/general/hrdp_1009_how_to_charge_a_agm_battery/viewall.html
The article said the trick is to put a second good battery in parallel with the battery that won't take a charge. That tricks the charger into thinking the battery is good enough to take a charge. Apparently many chargers won't try to charge a battery if the voltage is too low and adding the 2nd battery bumps the voltage up enough to where the charger thinks everything is okay. Anyway, it worked like a charm and I am back in business with a fully charged battery.
DC