bigsapper

No idea if it matters, but the computers and sensors in use today are sensitive to voltage requirements. I would pay attention to how the electronics behave with a lithium battery.

JerryU

They also measure a drop in voltage versus measuring current flow to activate some functions. As I recall that is how they operate the "memory wire" activated vent. Assume easier to measure and the micro's can detect it rapidly.

stevebz06

I usually weigh everything that comes in and out of my car. I replaced a lead acid battery with an AGM battery for the sole purpose of saving weight (I spent a considerable premium to get the AGM battery).

So imagine what I thought when I discovered the AGM battery was several pounds heavier than the old lead acid battery.

juanvaldez

Got the Aerovoltz 16 cell. Claimed weight 3 lbs, actual 3' 11.5", 1,685 g. Ran into minor problem. Comes with 6mm terminals. Positive will bolt right up to the strip that attached to conventional terminal. Negative need a regular post style negative terminal. The conversions side terminal posts are 8mm. I order something that will work from ebay.

driver9

Thanks for the update. Looking forward to more info.

xBoostx

I know is old thread but info can still help others;

Braille makes the correct positive and negative diameter for the 6mm battery terminal connection found in must light weight batteries and are pretty cool.

https://www.summitracing.com/search/...hread-size/6mm

TEXHAWK0

I have had good luck with the AC Delco Professional grade batteries.
Get the Gold series with a 42 month free replacement.
I was surprised to find that the factory battery was only a silver series, which is 36 month, 30 month free replacement.
If worried about leakage, the Corvette has a vent tube that goes to the outside.

With free replacement 42 months, you should never have to buy another battery.
I went ahead and changed my battery out at 3 years.

From experience of others, I don't think the AGM batteries last as long as standard battery.
Friends have said theirs go out at 3 years almost every time.
ACDelco has the correct size AGM battery too, but the best one is only a 36 month.

http://parts-catalog.acdelco.com/cat...log_search.php

JerryU

Must have had a bad one! I have a Yellow Top Optima in my Street Rod for ~8 years! It is always on a small maintenance charger. A quality AGM will definitely last longer.

Put a Diehard AGM in my 2014 C7 end last summer (before I decided to sell it and upgrade to a Grand Sport!)

The C7 OEM Delco had a low battery voltage since it was new. Dealer said it was fine but ~12.4 volts after the surface charge is gone it's good! The AMG read 12.9 after I put in in. My new Grand Sport, the one time I checked, read 12.8 again after the surface charge is depleted, which takes 12+ hours.

I must have had a weak cell in the OEM Delco but I never used a charger and it was left on vacation 2 1/2 weeks several times.

FWIW

BELVIN20

I installed a Odyssey in my Z, direct fit, part number:0752-2020, model# 48-720, expensive battery, but worth it to me.

eboggs_jkvl

$220 is not bad for that strong a battery.


Elmer

BELVIN20

I can assure you the Odyssey is a super strong battery, and as you said price not bad for the electronics we have on today's car. I changed out my Z battery after 1year because the OEM Delco was slow cranking. In this case more power is better.

JerryU

Odyssey is a good battery. So is Optima IMO (there are past their "move problems") but it does not have the configuration that fits the C7. The Diehard AGM I installed last summer (# 50748) fits perfectly. On sale it was ~$125. Believe Autozone sells the same one under another name.

Here are the tech specs:

CCA (Cold Cracking Amps): OEM=565; Diehard AGM = 760; Odyssey = 723

20 hr Ah: OEM =70; Diehard AGM=70; Odyssey = 69

Reserve Capacity: OEM = NA; Diehard AGM= 120; Odyssey =130

Toured the Johnson Controls battery plant in town and saw, at the end of the line, labels for 25++ batteries! The workers put the labels on and package for shipment. They deliver JIT to AutZone, Advanced Auto etc.

FWIW

TEXHAWK0

Just read that AGM battery must be used on vehicles with the start/stop technology... Evidently, conventional batteries will only last a few weeks in those cars, so I guess they do have an advantage in some applications.

CP

http://www.autozone.com/ignition-tun...19460_929803_0

JerryU

Our BMW SUV has two batteries! One large AGM and a smaller one. BMW uses a form of energy recover. The large battery only charges when coasting or breaking. Only then is the alternator charging. There is a display showing when that occurs. Had the SUV on cruise control for ~2 hours on our flat Interstate in Eastern SC. Watched to see if at some point it would energize to charge the battery. Never did. Once in local traffic it charged when my foot was off the gas or when on the brake.

Italianfox

Ha! Us old timers used to trade our cars when the ashtrays were full but since there are no more ash trays I think a dying battery is becoming the reason now!

Flame Red

Thanks for all the tips guys.

Mine went shorted cell today, 2 years and 1 month old. Two volts output and two battery chargers refused to charge it.

Since Eddy Lampert ruined Sears, there are no Sears near me anymore. I see Ace Hardware carry Diehard batteries but not this particular one. The 20% discount code for AutoZone was invalid for batteries so screw them. Advanced Auto gave me 25% off a cheaper price so it worked out $143 after core including tax. It was exact replacements - EXCEPT with two big handles builtin! They have a clue. So much easier with the builtin handles!

As the previous poster said, they are all made by the same company on the same line with the same specs and they slap a different label on them at the end of the line.

Sk8Man_

AC DELCO PROFESSIONAL Batteries:

Battery
Part Number: 48HPG
Product Notes:
Gold High Reserve Battery
All; BCI 48, minimum vehicle Reqment: CCA 615/RC 110; Battery is vented to outside of vehicle; Use vent tube 20908491
Per Vehicle: 1; Years: 2014-2018

Battery
Part Number: 48PG
Product Notes:
Gold Battery
All; BCI 48, minimum vehicle Reqment: CCA 615/RC 110; Battery is vented to outside of vehicle; Use vent tube 20908491
Per Vehicle: 1; Years: 2014-2018

Battery
Part Number: 48PGHR
Product Notes:
Gold High Reserve Battery
All; BCI 48, minimum vehicle Reqment: CCA 615/RC 110; Battery is vented to outside of vehicle; Use vent tube 20908491
Per Vehicle: 1; Years: 2014-2018

Battery
Part Number: 48PGHRC
Product Notes:
Automotive AGM Battery
All; BCI 48, minimum vehicle Reqment: CCA 615/RC 110; Battery is vented to outside of vehicle; Use vent tube 20908491
Per Vehicle: 1; Years: 2014-2018

Battery
Part Number: 48PS
Product Notes:
Silver Battery
All; BCI 48, minimum vehicle Reqment: CCA 615/RC 110; OE replacement; Battery is vented to outside of vehicle; Use vent tube 20908491
Per Vehicle: 1; Years: 2014-2018

I am assuming that the last battery in this list is the one found in most if not all 2015 - 2018 Z06 cars??? My car is a 2015 that turned three years old from date of manufacture this month, March 16th.
It has only 13300 miles but the battery voltage has started fluctuating a good amount. I am actually thinking of going with the Sears Die Hard Gold 48AGM with 760CCA.

http://www.sears.com/diehard-advance...ype=SKIP_LEVEL#

Thoughts or Comments anyone?

JerryU

^^^
I bought the Sears AMG battery you show but only paid ~$125 (on sale) August 2016. I'd get an AGM battery but look around and you can buy the same battery at Advanced Auto, AutoZone etc. Recently saw for ~$150. Just be sure it says it fits a C7 (they are all the same.)

We have a Johnson's Controls battery manufacturing plant in town. During a tour we saw they made batteries for everyone! At the end of the line, when they come out of very large water baths where they are charged, folks put one of over 20 decals on them! Yep some cases are different colors but they produce and ship on a JIT bases!

I asked the plant manager who was conducting the tour what are the differences. He said the price charged! Different companies give different warranty and their price reflects their specific warranty! That is the retailers decision and essentially an insurance policy that comes with the price!

Johnson Controls is one of the largest battery manufactures in the country but no doubt others operate the same way! They also bough Optima, which is a different construction AGM. But that top configuration will NOT fit a C7. There is a large power board on the positive terminal and the posts MUST be recessed at the end to fit it.

If you're thinking of changing your own, there are some tricks. Might consider reviewing: http://netwelding.com/Battery_Issues.pdf

Sk8Man_

Thank You "JerryU" for your very helpful reply and especially the WA Technologies publication on battery installation procedures. I agree that the price of $209 on the web sight seemed rather high and the local Sears store in Amarillo quoted a price of $176 but has not one in stock. Takes about a week to have one in here from the factory. They are ordering some for stock and in the mean time I will do some further checking on availability and pricing. Thank you again!