• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 Dodge, Jeep and RAM Forum dedicated to FCA owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the SRT Forum today!


Are our batteries AGM?

BoostedCat

Member
Founding Member
Premium Account
Member ID
#1355
Messages
81
Reactions
123
Likes
17
City
Reno
State
NV
Country
United States
Vehicle
2019 Hellcat Redeye
#1
Just picked up a Noco Genius Battery maintenance charger. There's an option for 12v or AGM 12v. Are our batteries AGM?
 


BULL

Oh NO! Not that guy!
Staff Team
Founding Member
U.S. Marine Veteran
Donating Member
HFCOTM
Wiki Contributor
Member ID
#1079
Messages
14,585
Reactions
44,737
Likes
402
City
Weld County
State
CO
Country
United States
Vehicle
MY16 M6 Challenger Hellcat
HFCOTM
View Images
#2
Just picked up a Noco Genius Battery maintenance charger. There's an option for 12v or AGM 12v. Are our batteries AGM?

Not normally
 


OP
B

BoostedCat

Member
Founding Member
Premium Account
Member ID
#1355
Messages
81
Reactions
123
Likes
17
City
Reno
State
NV
Country
United States
Vehicle
2019 Hellcat Redeye
Thread Starter #3

BULL

Oh NO! Not that guy!
Staff Team
Founding Member
U.S. Marine Veteran
Donating Member
HFCOTM
Wiki Contributor
Member ID
#1079
Messages
14,585
Reactions
44,737
Likes
402
City
Weld County
State
CO
Country
United States
Vehicle
MY16 M6 Challenger Hellcat
HFCOTM
View Images
#4

Also, I believe that if a battery is AGM, it will actually say so on its label
 


Catless

Active Member
Member ID
#1407
Messages
155
Reactions
320
Likes
37
City
Parkersburg
State
WV
Country
United States
Vehicle
2015 Hellcat Challenger
#5
Flooded lead/acid with vent tube connection.
 


T_Trahan44

500 Posts Club
Founding Member
Member ID
#1185
Messages
883
Reactions
1,933
Likes
132
City
Spokane Valley
State
WA
Country
United States
Vehicle
2012 Challenger SXT
#6
Unless your battery is aftermarket, it should be standard Flooded/Lead Acid. All AGM batteries are regulated to be marked as AGM due to the fact that they need special chargers/maintainers, and it's unsafe to use the wrong charger/maintainer on them.
 


BULL

Oh NO! Not that guy!
Staff Team
Founding Member
U.S. Marine Veteran
Donating Member
HFCOTM
Wiki Contributor
Member ID
#1079
Messages
14,585
Reactions
44,737
Likes
402
City
Weld County
State
CO
Country
United States
Vehicle
MY16 M6 Challenger Hellcat
HFCOTM
View Images
#7
Unless your battery is aftermarket, it should be standard Flooded/Lead Acid. All AGM batteries are regulated to be marked as AGM due to the fact that they need special chargers/maintainers, and it's unsafe to use the wrong charger/maintainer on them.

Useful
;)
 


T_Trahan44

500 Posts Club
Founding Member
Member ID
#1185
Messages
883
Reactions
1,933
Likes
132
City
Spokane Valley
State
WA
Country
United States
Vehicle
2012 Challenger SXT
#8

Deano

1000 Posts Club
Law Enforcement
Member ID
#1269
Messages
1,139
Reactions
5,714
Likes
162
City
Roy
State
UT
Country
United States
Vehicle
2019 Challenger WBHC
#9
Unless your battery is aftermarket, it should be standard Flooded/Lead Acid. All AGM batteries are regulated to be marked as AGM due to the fact that they need special chargers/maintainers, and it's unsafe to use the wrong charger/maintainer on them.
I have used several Battery Tender Jr. on both types of batteries for many years without any problems.
They are rated for AGM as well as flooded.
 


T_Trahan44

500 Posts Club
Founding Member
Member ID
#1185
Messages
883
Reactions
1,933
Likes
132
City
Spokane Valley
State
WA
Country
United States
Vehicle
2012 Challenger SXT
#10
I have used several Battery Tender Jr. on both types of batteries for many years without any problems.
They are rated for AGM as well as flooded.
As long as they are rated for AGM, you won't really run any risks of damaging the batteries. If the tender is not rated for AGM, you risk damaging cells and potential fire/chemical hazards.
 


Hickster

4000 Posts Club
Founding Member
HFCOTM
Member ID
#781
Messages
4,892
Reactions
6,292
Likes
302
City
Seminole
State
FL
Country
United States
Vehicle
2018 Hellcat Challenger
#11
Just buy a Tesla then you will know every week.
 


Detroit Muscle

Active Member
U.S. Army Veteran
Member ID
#1480
Messages
104
Reactions
135
Likes
37
City
Apple Valley
State
CA
Country
United States
Vehicle
2019 Hellcat Redeye
#12
I can tell that the Optima brand Red and Yellow batteries require the AGM charge setting.
 


Jimmy N.

5000 Posts Club
Founding Member
Member ID
#996
Messages
5,429
Reactions
10,401
Likes
352
City
Lumberton
State
NM
Country
United States
Vehicle
'18 Challenger
#13
All AGM batteries are regulated to be marked as AGM due to the fact that they need special chargers/maintainers, and it's unsafe to use the wrong charger/maintainer on them.
If that was entirely true, we'd need to change alternators when switching to an AGM battery.
Those fancy Lithium batteries can be a different story.
 


Magnified

Poster Club Hall of Fame
Founding Member
Member ID
#1155
Messages
11,710
Reactions
19,827
Likes
352
City
West Texas
State
TX
Country
United States
Vehicle
2017 Charger HC (once upon a time)
#14
Just picked up a Noco Genius Battery maintenance charger. There's an option for 12v or AGM 12v. Are our batteries AGM?
Our batteries are POS.
 


T_Trahan44

500 Posts Club
Founding Member
Member ID
#1185
Messages
883
Reactions
1,933
Likes
132
City
Spokane Valley
State
WA
Country
United States
Vehicle
2012 Challenger SXT
#15
If that was entirely true, we'd need to change alternators when switching to an AGM battery.
Those fancy Lithium batteries can be a different story.
Not entirely. The problem with a charger is that it's running off of AC power, instead of the DC power that our alternators crank out. And that's where the issue lies. With AC power, the voltage can drop below that Zero voltage threshold. (if I remember correctly, I may be using the wrong terminology)

But as the alternator only cranks out DC power, it never crosses that threshold, thus negating the need for a special type of alternator.
 


Jimmy N.

5000 Posts Club
Founding Member
Member ID
#996
Messages
5,429
Reactions
10,401
Likes
352
City
Lumberton
State
NM
Country
United States
Vehicle
'18 Challenger
#16
Unless you swapped in a generator, your alternator puts out AC, right? Hence its name.
Which is then converted to DC, much like with a charger maintainer.
 


T_Trahan44

500 Posts Club
Founding Member
Member ID
#1185
Messages
883
Reactions
1,933
Likes
132
City
Spokane Valley
State
WA
Country
United States
Vehicle
2012 Challenger SXT
#17
Unless you swapped in a generator, your alternator puts out AC, right? Hence its name.
Which is then converted to DC, much like with a charger maintainer.
Regulators, both internal and external, change the current from AC to DC. while the alternator does crank AC, it is changed to DC before it reaches the battery.
 


Jimmy N.

5000 Posts Club
Founding Member
Member ID
#996
Messages
5,429
Reactions
10,401
Likes
352
City
Lumberton
State
NM
Country
United States
Vehicle
'18 Challenger
#18
Umm, yeah. Didn't I write that in the post you quoted?
And to nitpick, it gets changed to DC before it leaves the alternator, not in the cable going to the battery.
 


T_Trahan44

500 Posts Club
Founding Member
Member ID
#1185
Messages
883
Reactions
1,933
Likes
132
City
Spokane Valley
State
WA
Country
United States
Vehicle
2012 Challenger SXT
#19
Umm, yeah. Didn't I write that in the post you quoted?
And to nitpick, it gets changed to DC before it leaves the alternator, not in the cable going to the battery.
Yes. Forgive me for restating. But that is the reason we don't have to change out alternators when "upgrading" to an AGM battery. As far as I know, a regular maintainer doesn't have the limiting factor to keep the AGM cells within their spec. The alternator doesn't put out enough to charge the cells out of spec unless the alternator is faulty.

AGM rated battery chargers/maintainers have to be calibrated(for lack of a better term, I guess) to keep the cells within their specs. Otherwise, the battery fails quickly.
 


Jimmy N.

5000 Posts Club
Founding Member
Member ID
#996
Messages
5,429
Reactions
10,401
Likes
352
City
Lumberton
State
NM
Country
United States
Vehicle
'18 Challenger
#20
Maybe I've just been lucky, but the four Optimas I put in my toy hauler in '99 have never seen an AGM "tuned" charger or maintainer.
They've been fed by solar panels (with a controller, of course) when on the road, or a basic BatteryMINDer maintainer when parked. Well, since '13 it's been solar only.

What they do have, and one reason they are still going strong, I think, is that they've always had a Canadus desulfation unit on them.

But yes, I have tweaked a couple of BatteryMINDers to better suit AGM batteries.
 




Top