NEWS | Aug. 6, 2019

AGM Batteries: Rise From the Dead?

It’s alive!

That’s not what you expect to hear from a mechanic when you hand over a dead battery.

But it may actually be true. Absorbed glass mat (AGM) batteries like the 6TAGM may seem dead when they’re really not.

It happens when a battery’s voltage gets so low that it won’t register on a battery charger.

If you don’t know that batteries sometimes play this trick, then you’ll assume they’re totally dead.

How can you tell? Here’s a cheap and easy solution:
 
  1. Place a good battery parallel to the dead battery, positive to positive and negative to negative.   


     
  2. Attach the charger’s jumper cables to the good or bad battery, positive to positive and negative to negative.
     
  3. Charge for about 15-20 minutes. That pushes amperage into the dead battery, raising the voltage high enough to register on the charger.
     
  4. Remove the good battery.
     
  5. Now charge the bad battery like you would normally.
Watch the TARDEC video on how to bring dead batteries back to life. It’s on MilTube at: