As part of its HOT ROD torture test, this Optima AGM battery was deliberately dealt a long, slow, 2.2-amp discharge until it showed less than 4 volts across the terminals.

Diagnosing a faulty AGM battery requires more than a quick voltage test. Users should perform a capacity and temperature test or consult a battery monitoring system to confirm whether the unit is ...

Read CR's review of the Duralast AGM H8-AGM car battery to find out if it's worth it. Ad-free. ... The Duralast AGM H8-AGM is part of the Car Batteries test program at Consumer Reports.

The latest absorbed glass mat batteries can provide engine-cranking pulses up to 2,250 amps for five seconds, ensuring ...

New, advanced AGM batteries, such as Odyssey AGM2 batteries from EnerSys, are rated at 400 discharge cycles to 80 ­percent DoD and offer plenty of ­engine-­cranking capacity. When ­shopping, balance ...

The Good of AGM Deep Cycle Applications. Draining a battery to 50 percent before recharging it is referred to as deep cycling.This can often happen in the winter months when you leave your car or ...

I installed a new AGM battery in my 1999 Nissan Maxima. The radio will sometimes get loud and then return to normal.