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mikefocke · 07-03-2018, 11:01 AM

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.

07-03-2018, 11:01 AM	#7
mikefocke Registered User Join Date: Aug 2005 Location: Sanford NC Posts: 2,537	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.