AGM batteries - WTF?

[opentrackerSteve]

Thought I'd post this for discussion. What in the heck is wrong with AGM batteries?

I've gone through about 5 of them in the past 8 years or so with my Mustang.

They don't seem to like sitting. This last one is an Exide that I picked up from O'Reilly auto parts 13 months ago and it won't hold a charge. I put it on the trickle charger a week ago and the current would not drop below 2.5 amps.

Are AGM batteries so sensitive that my track time is causing internal cells to fail?

I was able to exchange this one, but not until after 3 trips to the store to 'discuss' this with the personnel. Their charge says the battery is fine and I told them their charger needs a new checkup.

 

[65coupei6]

AGM Batteries are very picky with chargers. I keep mine on a trickle charger when not in use. They is a certain way to charge them.

Here is a Hot Rodder magazine article : http://www.hotrod.com/techarticles/gene ... ewall.html

One more: http://www.bdbatteries.com/mcharging_procedures.php

 

[Shaun]

I've been running this little guy in my street/track 66 for about 4-5 years now - http://www.streetortrack.com/Powermaste ... tml. Only time I ever have issues is if I need to crank and crank and crank to get it fired up.

I keep it on trickle when not using the car regularly (like over winter).