hi everybody.
just got a diesel 2011 4.4L V8 FFRR!

im currently looking for a battery and i see a lot of recommendations here to go with a 020 AGM like the `Varta - Dynamic AGM H15 (105Ah, 950A)` for example.

that is a somewhat expensive battery when compared with a `Varta G14 (95Ah, 850A)` which i believe would still be in spec.
what would be the benefits of going with the bigger battery?

PS:
sorry if this is a dumb question. i don't really understand a lot of this.

Just remember that on the 4.4 fitting a 020 in place of the 019 will require some effort modifying the positive battery connection as it restricts the battery length that can be fitted.

Benefits are greater capacity so will take longer for any drain to flatten the battery. Get the highest CCA/Ah rating you can find.

Fit AGM. They can be discharged deeper and can accept charge rates higher than standard flooded batteries - the charging system is designed to work at around 14.7-14.8V which is acceptable to AGM but which is somewhat higher than the 14.4V charge voltage flooded batteries like for longevity.

Remember the BMS needs to be reset via diagnostics so the charging system knows the battery has been changed. 2012 (L322) 4.4TDV8 Vogue SE, RSE, Fuji White over Arabica.
Previous V8s: BMW 645Ci, P38 4.6, P38 4.0, Merc CL500
Previous others: Honda x1, Volvo x7, Rover x6, BMW x6, Ford x1, Mercedes x2, Skoda x3, VW x2, Renault x2, Citroen x1, Mazda x3, Nissan x1, Audi x3, Kia x1, Fiat x4, Subaru x3, Austin x2, Triumph x2, Jeep x2, Hyundai x2, Lexus x1, Mitsubishi x1, Saab x2... and some others I've forgotten!

Similar modifications as described in this thread will be required to accommodate the added length of a 020 battery:

https://www.fullfatrr.com/forum/topic58066.html 2012 (L322) 4.4TDV8 Vogue SE, RSE, Fuji White over Arabica.
Previous V8s: BMW 645Ci, P38 4.6, P38 4.0, Merc CL500
Previous others: Honda x1, Volvo x7, Rover x6, BMW x6, Ford x1, Mercedes x2, Skoda x3, VW x2, Renault x2, Citroen x1, Mazda x3, Nissan x1, Audi x3, Kia x1, Fiat x4, Subaru x3, Austin x2, Triumph x2, Jeep x2, Hyundai x2, Lexus x1, Mitsubishi x1, Saab x2... and some others I've forgotten!

Just get the standard size battery - it works well for normal usage. If you need extra capacity for running extra electrical items fit a 2nd battery in the right side boot space. 2012 TDV8 Vogue (L322)

An 020 will fit in a 3.6L pre 2010 but not vehicles 2010 onwards, with the fan and other gubbins in the tray.

019 works fine though, because the later FFRRs are less 'leaky' on battery draw.

019 AGM. Varta, Bosch, Numax, Exide, Powerline are all reputed brands. There's a Powerline in mine at the moment, fitted in 2018 and works fine. 2015 Range Rover Autobiography 4.4 SDV8

If you don't have diagnostics you don't "have" to tell the BMS you have fitted a new battery, it will learn it is new after a sort time...  Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

thanks for the input everyone.
i had no ideia a 020 wouldn’t fit out of-the-box on the L322 from 2010 onwards.

Haylands wrote:

If you don't have diagnostics you don't "have" to tell the BMS you have fitted a new battery, it will learn it is new after a sort time...