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crooks_uk
Member Since: 04 Jul 2017
Location: Newcastle-upon-Tyne
Posts: 42
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I have a 2015 D4 with stop start. The stop start function has not worked for some time due to the small auxiliary battery needing replacement. As I prefer it without the stop start I don't plan on replacing the smaller battery or making use of the stop start function in the future. When it comes to replacing the main battery, can I use a normal lead acid rather than AGM battery to reduce cost?
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 11th Sep 2022 12:49 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 13041
  
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AGM batteries (allegedly) work out the same value ... cost more but last longer.
I'd stick with AGM ... JLR started using just AGM at some point with D4s.
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| 11th Sep 2022 1:15 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8243
 
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If you haven’t a warning lamp on and you fit a new main battery your SS will work. It can when others can't,
It will when others won't,
It goes where others don't.
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| 11th Sep 2022 2:20 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8243
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DP. It can when others can't,
It will when others won't,
It goes where others don't.
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| 11th Sep 2022 2:21 pm |
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crooks_uk
Member Since: 04 Jul 2017
Location: Newcastle-upon-Tyne
Posts: 42
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M3DPO wrote:If you haven’t a warning lamp on and you fit a new main battery your SS will work.
Eco light is showing but main battery is all good. Just wondering for when the time comes to replace it if using a lead acid will cause problems
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| 11th Sep 2022 6:48 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8243
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It’s the small auxiliary battery that needs changing to get the light off, SS may or may not work, if it doesn’t it’s ready for a new main battery although that doesn’t necessarily mean the main battery is completely goosed, just nearly goosed  It can when others can't,
It will when others won't,
It goes where others don't.
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| 19th Sep 2022 4:10 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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If you fit a lead-acid battery, it won't last long as the AGM charge strategy is very different - and a higher voltage in lower temperatures.
Purely replacing the starter battery won't re-enable the autostop, neither will replacing the secondary battery, only a reset of the BMS together with the failed battery will re-enable autostop.
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| 19th Sep 2022 5:27 pm |
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crooks_uk
Member Since: 04 Jul 2017
Location: Newcastle-upon-Tyne
Posts: 42
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Thank you for the advice
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| 19th Sep 2022 8:36 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8243
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No reason why you can't fit a lead acid battery, but it will not charge as fast as an AGM unless the CCF is changed and even then it will not accept charge as fast, if you do long journeys it won't be a problem. There is no doubt AGM are superior, no acid to spill out and will still work upside down and accept charge at lower volts.
Although good practice to reset the BCM, it is not essential as the BCM will quickly learn that there is a new battery. It can when others can't,
It will when others won't,
It goes where others don't.
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| 20th Sep 2022 8:24 am |
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Moleshome
Member Since: 15 Oct 2020
Location: Wokingham
Posts: 412
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Quote:will still work upside down
I can't help thinking that if it's upside down charging is probably the least of your worries.
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| 20th Sep 2022 4:06 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8243
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They where originally developed for use in lifeboats, they have been known to overturn  It can when others can't,
It will when others won't,
It goes where others don't.
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| 20th Sep 2022 4:41 pm |
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nigethecat
Member Since: 11 Sep 2016
Location: Marnoch
Posts: 4252
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Moleshome wrote:Quote:will still work upside down
I can't help thinking that if it's upside down charging is probably the least of your worries.
But leaking battery acid might be ! I want to see the sweets before I get into your windowless van... I'm not stupid!
Corris Grey D4 Commercial SE 2016
Zermatt Sliver 2007 D3 SE manual (gone)
Indus Silver D4 HSE 2015 (gone)
Bonatti Grey D3 HSE 2006 (gone)
White D3 S (LHD) 2007 (gone)
Firenze Red D4 HSE 2014 (gone)
Black RRS 3.6TDV8 2008 (gone)
Rusty Green Defender 110 1997 (gone)
Black FL2 HSE 2013 (gone)
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| 20th Sep 2022 4:48 pm |
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s60r
Member Since: 14 Mar 2021
Location: West Sussex
Posts: 287
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A new AGM battery can be got for under 130.... don't pay LR prices....
Also, I have replaced both batteries and reset with IID and still the Start/Stop doesn't work.
There is a TSB for the issue which involves replacing the module next to the small aux battery.... so replacing the battery(s) doesn't always get the S/S going....
Mine is under warranty and I might get the TSB done.... I might not though as I don't really like the start/stop! I just like everything to work though.... its rare in a LR A mod a week until I have nothing to improve or add.
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| 20th Sep 2022 9:17 pm |
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