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Products for your Boxster, Cayman and Carrera.
My current battery isn’t holding a charge.

a) what battery size am I supposed to buy? I’ve seen mention of two.
b) are all of them vented?

I think I need a 10mm and 14mm socket for removal and install. I have my radio code.

Anything else need to know, or do I take it to my mechanic?


Andrew
The 986 (Model years 1997-2004) takes a BCI Group 48 (12.1X 6.9 X 7.6"), the 987 (2005-) takes a BCI Group 94R ( 12.4 X 6.9 X 7.5 "); both right hand positive terminal. The 94R is also slightly lower in CCA.

The 986 Tiptronic battery is bigger than the manual transmission version. They are listed this way in the general section of the official repair manuals:

Ah/A 60/280 Manual

Ah/A 70/320 Tiptronic

So buy a bigger CCA battery if you live in colder climes, drive a TIP Boxster, or have a bigger amp in the car.
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