Had the low power mode warning come up as I started her up Tuesday evening, drove to the restaurant and back no problems, but in the morning the battery was flat, charged the battery that night, next afternoon battery flat again, even though the charger was indicating the battery was charged. So I’m assuming the battery is dead

What battery do I need? And where’s the best place to buy one?

I’m sure on my previous cars I have used Eurocarparts

Thanks in advance

John

Euro and put the reg number in and you will have a choice of brands

Done that, also get a choice of batteries - C17, C19 and C20! Which one is preferred?

I used a Varta G14 AGM Stop Start battery. Came from Tanya Batteries delivered next day. The 020 will not fit it's to long 393mm as opposed to 353mm, unless battery box and wiring is modified slightly. 017 and 019 are same dimensions so both will fit, not sure of the rating of each, though imagine 019 is slightly higher Ah and CCA and possibly terminal height lower on 017 depending on manufacturer.


Cheers
Col

Thanks for the advice

The C17 is 88Ah and cca is 680A
The C19 is 95ah and cca is 750A
Both are same dimensions

Will either of these do? Or do I need the C19?

Personally I would go for the highest rated one I could get in.

Cheers
Col

Thanks mate,

C19 it is then! Would you pay the extra for the Bosch? (£65) or is there not much difference between the Lion and the Bosch?

Also, when changing the battery is there anything I need to know/do to stop me causing problems with the electrics?
Do I disconnect the positive 1st? Then when reconnecting, the positive 1st again?

Sorry for all the questions, and thanks for you help 👍🏻

John

No, disconnect Negative first and reconnect last, nothing else to worry about but bare in mind the battery is quite heavy and relatively tight fit, move leads well out of way first.

Cheers
Col

Thanks mate

What ever you do DO NOT BUY A LION BATTERY!!!
If you do you will be roaring when it goes flat.....

As your RRS is a 2011 model it may have a battery monitoring system - A lot of markets had a BMS from 2010 onwards. I was under the impression that this needs to be reset when changing the type of battery or putting in a battery of different capacity and if you don't the charging system starts doing funny stuff.

Never reset mine and never made a blind bit of difference, if you do reset it would suggest you make sure battery is fully charged first.

Cheers
Col

The battery in my 2010 TDV8 is a AGM 95Ah unit with 850CCA.

I made one of this, made replacement much easier

Click image to enlarge

Click image to enlarge

Not quite sure that would work on a sport as the battery is in a different position to the fullfat. The position of your wooden plank is directly over the battery on a sport as it is.

Cheers
Col