The RR didn’t want to start yesterday. I put a battery charger on it and the car drove nicely about one hour later.

Later, I got out the voltmeter and got 14.3V running, but only 12.06V with the car off and a good 5 hours on charge. So, I think I need a new battery, right?

I seen some scary warning about unplugging the battery and also a nice video on how to extra-raise the bonnet to get in there. So, what do I need to know about actually changing the battery other than NEG off first and on last?

Any precautions other than waiting for two minutes after engine switch off for the computers to shut down?

If the doors are opened or unlocked, will that wake the computers, or am I good along as it’s 2 min since running the engine?

I have a battery charger. Should I try connecting it to the battery terminals to try and not interrupt the power? Is that worth trying?

If the power IS interrupted, what needs to be done to reset everything? (I remember something about turning the steering wheel lock-to-lock.)

Thanks

Last time I replaced a battery I didn't. I know that sounds like a bit of nonsense but the car was due a service so I said to the guy doing the service "Oh by the way there's a battery on the floor behind the passengers seat can you fit it please" . He did but I have changed batteries myself on previous Range Rovers with no problem. Disconnect, remove old battery, put new battery in place and reconnect. I did the steering thing and also had to reset the date, time etc. The waiting time people speak of was, in my case, the time it took to remove the old and position the new battery. Geoff

If you have a FF lol Its worth investing in a cheap battery tester.

https://www.ebay.co.uk/itm/133088919132 2018 SE SDV8 4.4 Byron Blue

My 62 plate Westminster 4.4 V*8. diesel is pulling 11.4 volts and needs a boost to start. The battery is a Jaguar one, althought given the vehicle's age, unlikely to be the original.

Does anyone have any recommendations of specific replacement batteries please.
I had a Yuasa in my Disco V8 which seemed sufficiently robust. My Land Rovers, so far:
Defender 90 V8 County
Disco V8S
Disco V8 GS
Freelander 1 TD4
Freelander 1 V6
RR L322 Westminster

Fitted one of these a few weeks ago.
https://www.tayna.co.uk/car-batteries/exide/ek950/
Not a job to do without being prepared as there is a security plate that needs a special 5 star torx and the lift in and out is awkward. 2012 TDV8 Vogue (L322)

I ended up getting an original one from the local dealer. They had a deal on at the time. Think it was about £170.

Worth trying to get a price, if only for comparison purposes.

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Thanks for the prompt replies. I’m seeing online prices from £145 to £270 so will choose carefully. No point in false economies! My Land Rovers, so far:
Defender 90 V8 County
Disco V8S
Disco V8 GS
Freelander 1 TD4
Freelander 1 V6
RR L322 Westminster

I was umming & errring about changing the battery myself, but in the end it was a very simple, basic operation.
I bought one of these ‘security torx’ sockets & it was plain sailing.
https://www.ebay.co.uk/itm/115055566053 2012 Orkney Grey Westminster 4.4TDV8 with Ivory interior.........nice!
BMW R1200GS
Alfa Romeo Giulietta
Just one Montesa now, 349 White Wonder
Austin A40 Farina MK2
1975 Morris Marina 1.8TC

YBX5019 Yuasa Silver High Performance Car Battery 12V 100Ah HSB019 1 £93.95
P&P £9.48
TOTAL £103.43

From Tanya batteries. Comes with5 year warranty. Took the old one out easily and did a reset by holding +ve and -ve together for a while. Car has been fine ever since!

Easy job really. FFRR 4.2SC/KTM 990SMT Current and cherished.
Honda Accord 2.4 Vtec touring. (Yeah, I know, think: Kids)
Mitsubishi Pajero Evolution Nut-wagon. and a Buell XB12R
TVR Griffith 5.0 (backed up with Vauxhall Carlton road barge for the weekly shop.)
Honda Integra Type R DC2 Possibly the best drivers car. Ever.
Mitshibishi FTO GPX MIVEC.
Honda CRX Vtec Mk2 -NO, Not the del sol!!!
Volkswagen Scirocco GT
Mini 1275GT
MG Midget (Heavily modified)
I'm going to stop now.....