battery is dead...how do I jump start it?

[Paul]

7 year warranty, has provision for the vent hose, exact fit. Your car needs nothing better than this one!! $70.

BTW I do have this one in mine.

http://www.autozone.com/servlet/UiBroker?UseCase=C001&UserAction=performSearch&Parameters=Auto+Store%7C%7EREGULAR+PARTS+LOOK+UP%7 C%7EBattery

[porsche986spyder]

Originally Posted by Paul

7 year warranty, has provision for the vent hose, exact fit. Your car needs nothing better than this one!! $70.

BTW I do have this one in mine.

http://www.autozone.com/servlet/UiBroker?UseCase=C001&UserAction=performSearch&Parameters=Auto+Store%7C%7EREGULAR+PARTS+LOOK+UP%7 C%7EBattery

Yellow top OPTIMA stil has MORE POWER AND RESERVE CAPACITY. But you get what you pay for.

[SC986]

+2 on the Yellow Top. I had a Yukon with the touchscreen Nav, DVD, PS2, Four Monitors, Two JL Amps. My battery was always low and dead. Switched to the yellow top and never had any issues.

Mine sat like your Boxster, it would still be dead in the winter if I did not crank it for two or three weeks. After about 15 minutes on a trickle charger and it was cranking the Yukon.

[Paul]

Originally Posted by porsche986spyder

Yellow top OPTIMA stil has MORE POWER AND RESERVE CAPACITY. But you get what you pay for.

Both have a 2 year full replacement warranty, both are more than enough to start a Boxster year round anywhere in the US.

One costs $70 the other at least $150 and is not an exact fit, plus isn't the yellow top a deep cycle battery not a starting battery?

[donv]

Vanessa, I think it's lighly likely you're going to need a new battery. A charged conventional car battery will not freeze even when subjected to ungodly low temps like -40, but a discharged battery could freeze at temps like you encountered. The act of freezing solid will usually either crack the case or break the plate structure inside the battery. In the first case, when the battery thaws you can end up with an acid leak (nasty!). In the second, the battery will have less or even no power (depends upon the degree of damage, whether it takes out just one cell or more).

The Optima battery that folks have mentioned here is a different design and does not have cells with an acid bath, in addition to the other benefits that have been mentioned. However, they are significantly more expensive than a conventional battery.