Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Please check the Forum Guidelines at the top of the Newbie section

Pages: [1] 2  All   Go Down

Author Topic: AGM v not AGM  (Read 536 times)

0 Members and 1 Guest are viewing this topic.

TheBoy

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • Brackley, Northants
  • Posts: 103872
  • I Like Lockdown
    • Whatever Starts
    • View Profile
AGM v not AGM
« on: 05 August 2022, 16:32:57 »

Quickie question...

Can I use a non AGM battery in a car that was factory supplied with an AGM one?
Logged
I no longer own a Zafira, I should be happy, but I miss it in a perverted sort of way.

Raeturbo

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • South Wales
  • Posts: 5420
    • Mv6 3.2 Mitsi Evo2. XJ8
    • View Profile
Re: AGM v not AGM
« Reply #1 on: 05 August 2022, 17:34:45 »

Can I replace a lead acid battery with an AGM battery?
Yes for the most part an AGM is a drop in replacement for your standard Lead Acid Battery. The charging voltages are almost identical. You are correct that they have a lower internal resistance and can be charged at a much faster rate.12 Jan 2015
Logged
Laying a rubber road.

Raeturbo

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • South Wales
  • Posts: 5420
    • Mv6 3.2 Mitsi Evo2. XJ8
    • View Profile
Re: AGM v not AGM
« Reply #2 on: 05 August 2022, 17:37:10 »

Yes for the most part an AGM is a drop in replacement for your standard Lead Acid Battery. The charging voltages are almost identical. You are correct that they have a lower internal resistance and can be charged at a much faster rate. This shouldn't cause a problem on the majority of vehicles as the wiring in the car is designed to handle the maximum rated output of the alternator.
Logged
Laying a rubber road.

TheBoy

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • Brackley, Northants
  • Posts: 103872
  • I Like Lockdown
    • Whatever Starts
    • View Profile
Re: AGM v not AGM
« Reply #3 on: 05 August 2022, 18:10:11 »

Wrong way round Rae, can I drop in a non AGM batt into a car designed to tale an AGM?
Logged
I no longer own a Zafira, I should be happy, but I miss it in a perverted sort of way.

STEMO

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Posts: 6136
    • Astra 2.0 diesel
    • View Profile
Re: AGM v not AGM
« Reply #4 on: 05 August 2022, 18:13:56 »

Wrong way round Rae, can I drop in a non AGM batt into a car designed to tale an AGM?


https://youtu.be/zGKk2SzYIig
Logged
Diesel till I die

Raeturbo

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • South Wales
  • Posts: 5420
    • Mv6 3.2 Mitsi Evo2. XJ8
    • View Profile
Re: AGM v not AGM
« Reply #5 on: 05 August 2022, 20:24:27 »

👍
Logged
Laying a rubber road.

Andy H

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Auckland
  • Posts: 5466
    • Mazda MPV
    • View Profile
Re: AGM v not AGM
« Reply #6 on: 05 August 2022, 22:30:44 »

Stop-start gives the battery a work out - potentially causing a reduction in battery life

I thought that AGM batteries were developed in an attempt to try to make the battery last a bit longer. :-\

My guess is that you won't notice any difference if you can manage to avoid using the stop-start. What we need is someone to drop a standard battery in and report back on longevity - can you think of anyone curious enough to try ?  ;D
Logged
"Deja Moo - The feeling that you've heard this bull somewhere before."

johnnydog

  • Omega Knight
  • *****
  • Offline Offline
  • Gender: Male
  • Lancashire
  • Posts: 1421
    • 2.6 & 3.2 sal, 3.2 est
    • View Profile
Re: AGM v not AGM
« Reply #7 on: 05 August 2022, 23:03:16 »

https://www.yuasa.co.uk/info/technical/start-stop-vehicle-battery-replacement-warning/

My AGM battery on my Audi failed under warranty, and was replaced by Audi, but the replacement AGM had to be programmed to the car. Certain electrical components won't function correctly without the programming. I understand that AGM and EFB batteries should be replaced with like for like. No doubt owners have gone against this recommendation, but that is the advice. The link above gives some insight into the reasoning behind it.
Logged
2002 3.2 Elite saloon, 2003 3.2 Elite estate, 2003 2.6 Elite saloon

Kevin Wood

  • Global Moderator
  • *****
  • Offline Offline
  • Gender: Male
  • Alton, Hampshire
  • Posts: 36010
    • Jaguar XE 25t, Westfield
    • View Profile
Re: AGM v not AGM
« Reply #8 on: 06 August 2022, 00:00:27 »

You might find it does some "mild hybrid" deeper cycling of the battery than is normal for a wet cell battery. That might involve charging it more aggressively than would be normal for a wet battery. Only one way to find out, though. The world isn't going to end, at any rate.
Logged
Tech2 services currently available. See TheBoy's price list: http://theboy.omegaowners.com/

TheBoy

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • Brackley, Northants
  • Posts: 103872
  • I Like Lockdown
    • Whatever Starts
    • View Profile
Re: AGM v not AGM
« Reply #9 on: 06 August 2022, 08:12:09 »

Stop-start gives the battery a work out - potentially causing a reduction in battery life
That piece of shit will be disabled whatever ;)
Logged
I no longer own a Zafira, I should be happy, but I miss it in a perverted sort of way.

TheBoy

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • Brackley, Northants
  • Posts: 103872
  • I Like Lockdown
    • Whatever Starts
    • View Profile
Re: AGM v not AGM
« Reply #10 on: 06 August 2022, 08:15:15 »

You might find it does some "mild hybrid" deeper cycling of the battery than is normal for a wet cell battery. That might involve charging it more aggressively than would be normal for a wet battery. Only one way to find out, though. The world isn't going to end, at any rate.
Her battery sounds like its struggling, and I have a reasonable battery from my XJ in the garage, so its a no cost option to do something until batteries become more sensibly priced...   ...or I have to bite the bullet and splash down the wrong side of 150 for an AGM one :(
Logged
I no longer own a Zafira, I should be happy, but I miss it in a perverted sort of way.

Migv6 le Frog Fan

  • Omega Queen
  • *****
  • Offline Offline
  • Gender: Male
  • Webs End.
  • Posts: 10495
  • Nicole's Papa
    • 3.2 Elite, Boxster, Clio
    • View Profile
Re: AGM v not AGM
« Reply #11 on: 06 August 2022, 08:20:44 »

well,if you buy one of these modern contraptions........ ::)
Logged
Women are like an AR35. lovely things, but nobody really understands how they work.

Kevin Wood

  • Global Moderator
  • *****
  • Offline Offline
  • Gender: Male
  • Alton, Hampshire
  • Posts: 36010
    • Jaguar XE 25t, Westfield
    • View Profile
Re: AGM v not AGM
« Reply #12 on: 06 August 2022, 09:44:16 »

Stop-start gives the battery a work out - potentially causing a reduction in battery life
That piece of shit will be disabled whatever ;)

It's particularly dumb on the XE. Always stops the engine just as I'm about to pull away.

Do you know if it can be permanently disabled? I'd be up for that. :y

You might find it does some "mild hybrid" deeper cycling of the battery than is normal for a wet cell battery. That might involve charging it more aggressively than would be normal for a wet battery. Only one way to find out, though. The world isn't going to end, at any rate.
Her battery sounds like its struggling, and I have a reasonable battery from my XJ in the garage, so its a no cost option to do something until batteries become more sensibly priced...   ...or I have to bite the bullet and splash down the wrong side of 150 for an AGM one :(

I can't imagine it'll do any harm, as long as it doesn't vent in the spare wheel well, of course.

The one thing you don't want in an XE is an unreliable battery, as it does a bloody good job of immobilising itself when it goes flat.
Logged
Tech2 services currently available. See TheBoy's price list: http://theboy.omegaowners.com/

Sir Tigger QC

  • Get A Life!!
  • *****
  • Offline Offline
  • Gender: Male
  • West Dorset
  • Posts: 20956
    • 2 Fords
    • View Profile
Re: AGM v not AGM
« Reply #13 on: 06 August 2022, 14:29:11 »

If stop/start cars with AGM batteries have beefier alternators, is there not a danger that a normal battery would get 'over cooked' by the alternator and go bang?  ???  :-\
Logged
RIP Paul 'Luvvie' Lovejoy

JC is not The Messiah, he's a very naughty boy!!

Andy H

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Auckland
  • Posts: 5466
    • Mazda MPV
    • View Profile
Re: AGM v not AGM
« Reply #14 on: 06 August 2022, 16:03:14 »

If stop/start cars with AGM batteries have beefier alternators, is there not a danger that a normal battery would get 'over cooked' by the alternator and go bang?  ???  :-\
the chemistry is still the same so the target voltage should be the same (14.7v?) :-\

The impedance in the battery will probably limit the maximum current rather than the alternator.
Logged
"Deja Moo - The feeling that you've heard this bull somewhere before."
Pages: [1] 2  All   Go Up
 

Page created in 0.031 seconds with 19 queries.