Jims79

The current battery in the vette is 6 yrs old so I figure replace it before it fails. Anyway I was thinking AGM wow they are expensive. So so the new wet batteries still leak acid? The current bat is sealed and I can't find any sealed batteries. OK I just haven't looked that hard.

So is AGM the way to go??

3boystoys

It's the way to go, the AGM in my bike and Vette are 8-10 yrs old. I keep them both on float chargers when in the garage and still work great.

Vetteman Jack

It is what I would buy if it were my car.

Jims79

And that's just what I did. Purchased an AC Delco AGM 78 series battery on Amazon for $103. Saved over $130 not bad. But it won't be delivered until Nov 23. So lets hope the 6 yr old AC Delco holds on for another month.

I updated my shipping by adding another $20. should get the battery in a week to 10 days now. Hope its a fresh battery not one sitting on a shelf for a year.

4XLR8N

I would go with AGM, especially in a C5. That is what I will be doing when it is time for a new battery.

vetteguy8

I bought Exide AGM, the one with the blue top, had to replace my 7 year old Optima that was in the car ! Love it and highly recommend AGM, it was only 30 dollars more than a decent none AGM battery !

Cliff8928

I went AGM too... 34DT-AGM from AutoZone

Cybermind

Same here! Exide Orbital AGM. Still going strong after 5 years. Just make sure you keep it on a proper battery maintainer set on AGM (such as C-tek US3300). AGM's require slightly more voltage when on a battery maintainer so ensure that yours has the AGM battery setting.

Jims79

Oh, I didn't know that. I use the Battery Tender 021-0123 Battery Tender Junior 12V Battery Charge. It doesn't have a setting just charges battery and turns off when the led goes from yellow to green.

3boystoys

I've been using regular tenders on my AGM's. The biggest issue with AGM's is trying to charge them if they have been heavily discharged (google it and you'll see why).

srs244

for what it's worth, the "trick" to charging a really drained AGM battery is to use a set of cables and run the donor car for about 15 minutes while connected. it will provide enough of a shot for most of the modern digital chargers to recognize the battery again and provide a charge. i had that problem when my 78 drained thanks to a glove box lamp cut off switch that didn't, lol. i ran cables from my other car in the garage to the AGM in the 78 and then was able to get my digital charger to recognize that there was a battery hooked to it, lol.

LT1driver

did not when I replaced orginal agm on my 03 but will next time when my gold top AZ battery lets me down.

Cybermind

Yes, I agree. AGM batteries can be maintained using regular tenders without any issues. But, to get the optimum life expectancy out of them, it is recommended that they be charged at a slightly higher voltage and that is why most modern battery maintainers (such as C-tek) will have the AGM charge setting. Does it make a significant difference in the long run? I don't know. But if your battery tender has the AGM setting, then it's best to use it. Just my two cents.

3boystoys

10yrs or so on my bike and vette with AGM batteries and regular float chargers. Haven't changed a battery in either yet.