the difference between cranking and leisure battery

[Guy d]

Hi, i seek advice on difference between leisure battery and a cranking battery. I picked up one of each from vw and i'm not absolutely sure which is which (nor was the mechanic who gave them to me!)



Both are vw branded

the first serial number is 000915105 CD, 75ah 420a, and is black, and is also labelled AGM

The other is serial number 000915105 DJ 85 ah 450a and is white

Could someone confirm which is the leisure and which is the cranking battery?

Secondly, assuming both leisure batteries are flat, what happens if i only replace one leisure battery? Will the old one knacker the new one?

 

[WelshGas]

Hi, i seek advice on difference between leisure battery and a cranking battery. I picked up one of each from vw and i'm not absolutely sure which is which (nor was the mechanic who gave them to me!)



Both are vw branded

the first serial number is 000915105 CD, 75ah 420a, and is black, and is also labelled AGM

The other is serial number 000915105 DJ 85 ah 450a and is white

Could someone confirm which is the leisure and which is the cranking battery?

Secondly, assuming both leisure batteries are flat, what happens if i only replace one leisure battery? Will the old one knacker the new one?

View attachment 88534

According to Google 000915105 CD is sold as a Starter Battery.

According to best practice, and VW, Leisure Batteries should be replaced in pairs for best performance and longevity.

These are the normal VW replacements fitted.
Starter

F21 Varta Silver Dynamic Start-Stop Plus AGM Car Battery 12V 80Ah (580901080) (110 AGM)

F21 VARTA Silver Dynamic AGM Car Battery <i>Innovation with Purpose, Premium Experience, Powerful History</i> VARTA was founded in 1887 Germany, and was established fully in 1904 by delivering the first electric vehicle battery, famously driven by Thomas Edison. Soon after, VARTA delivers the...

www.tayna.co.uk

Leisure

LA80 Varta Professional Dual Purpose AGM Leisure Battery 840 080 080

LA80 VARTA Professional Dual Purpose AGM Leisure Battery <i>Innovation with Purpose, Premium Experience, Powerful History</i> VARTA was founded in 1887 Germany, and was established fully in 1904 by delivering the first electric vehicle battery, famously driven by Thomas Edison. Soon after, VARTA...

www.tayna.co.uk

 

[egena]

Hi, i seek advice on difference between leisure battery and a cranking battery. I picked up one of each from vw and i'm not absolutely sure which is which (nor was the mechanic who gave them to me!)



Both are vw branded

the first serial number is 000915105 CD, 75ah 420a, and is black, and is also labelled AGM

The other is serial number 000915105 DJ 85 ah 450a and is white

Could someone confirm which is the leisure and which is the cranking battery?

Secondly, assuming both leisure batteries are flat, what happens if i only replace one leisure battery? Will the old one knacker the new one?

View attachment 88534

Looking at my own pair of factory leisure batteries and popping the bonnet open, the black AGM is the leisure battery and the white, starter.
I agree with welshGas, change both leisure simultaneously if your budget allows. If not, don't swap it out yet, wait until you have both leisure battery replacements.
Varta sell them directly for about £170 and is, as WelshGas mentioned, model: "LA80" AGM which may likely be cheaper than with VW.

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