Hi Porsche Doc and everyone,

I just found my Cayenne has 2 batteries. I guess the back one is for starting
and other for general use. Does anyone have more info? Having 2 batteries
double the time or capacity to discharge for use or if one is away from their
car? Both battery are quite heavy duty. Anyway to know if a battery has
gone bad?

So far, the lights are bright when I open the doors However there was a
few months I was away, thus now I have it on a trickle charge. Also, if I
need to replace the battery Odyssey batteries have a longer staying power
than Porshce OEM battery. Thank you for your help and detailed description.

All the best,

Miracle

 

Absolutely do not put a porsche OEM battery back in. They are junk. Get an optima, or any quality battery from your local parts store. Interstate, walmart, autostart, etc
[align=right] [/align]

 

Thank you Porsche Doc and everyone for your message.

Based on my research Odyssey, Optima, Diehard are the best batteries.

Does anyone know who makes Porsche OEM batteries? Everyone I run
into states they do not if anyone who needs to changea battery yet, I assume
this because most Cayenne are driven are regular basis vs. 911 which some
only drive when the weather is favorable.

 

Hello everyone,

Any issues placing a AGM battery like Optima/Odysessy as a stater battery,
and regular wet acid battery for general use in a dual battery system Cayenne?

In everyday use, will one battery overcharge or undercharge? Thank you!

 

Hello,

Any issues when having a regular (wet) battery and AGM (Optima, Hawker) for
Cayenne that uses 2 batteries?? Thank you in advance.