Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Typical Battery Life?


Recommended Posts

Hi there,

I have a 2003 Boxster S (986) and it's coming up to the 5 year mark. It's a daily driver for me so it has about 50,000 miles on it (80,000 km). In the recent months, I have been driving the car significanlty less and sometimes about once a week, and only for short distances (maybe 10 miles each trip).

It's been dealer serviced since day one until the warranty expired about a year ago. Anyway, this morning, when I tried to start the car, I hear a solenoid click when I turned the ignition key but the starter did not crank. After a few more tries, I hear the starter slow-crank a couple of times but still no luck (so starter motor should be OK).

I consulted my Bentley's Boxster manual and did an open-circuit voltage check to find the voltage to be about 9.5 volts, which suggested a drained battery, which led me to come up with 3 possible scenarios: drained battery, faulty battery, or bad alternator. I bought a battery charger and it is charging the battery as I type. Hopefully, this can get my car started.

However, I wonder if there is any easy way to test for a bad alternator without any sophisticated tools? My worst fear is that I drive my car out and it gets stranded outside. Is 5 years a pretty normal time to replace the battery? Does the make of the battery matter that much qas long as the specs are matched?

I recently did some minor servicing on the car myself: oil & filter change, pollen filter replacement and air filter replacement (disengaged the soft top and opened the top engine compartment). Would this have anything to do with this problem by any chance?

Any help and pointers will be greatly appreciated!

Edited by primate
Link to comment
Share on other sites

I'm with Loren on this one

I've owned probably 25 vehicles over my life and 5 years is a long time for a battery to last. My 2002 Acura has had its battery replaced. My 2001 Boxster likewise.

I'll grant daily use is better for the battery, but a prophylactic replacement at about 4 years just before the next winter is not an unwise thing IMHO.

I wouldn't even bother further testing, I'd just replace the battery based on the voltage reading.

You can do it yourself and don't have to use the dealer's overpriced replacement batteries.

A list of batteries known to fit is at the beginning of this link.

Link to comment
Share on other sites

Thanks Loren and everyone's replies. I appreciate it!

Well, the good part of the story is that I managed to get the car cranking and running after an hour's worth of trickle charging. That one hour charge brought the battery up to about 12.4V open circuit and about 14.0V with the engine running, which is within the general range of 13.5-14.5V for a working alternator. So the good news is that the alternator need not be replaced ... yet.

As for the battery, I think I will heed everyone's advice and pick up a new one. The one I have now is the original Porsche-branded Moll battery. Is there any specific brand recommendation for a replacement?

Thanks again!

The following is Porsche's test spec for the vehicle battery (from TSB 4/02 2706 Battery - Maintenance Checklist -- dated 3-7-03)

post-1-1198425850_thumb.png

Link to comment
Share on other sites

  • Moderators

Look here first. http://www.renntech.org/forums/index.php?showtopic=2950

Your S probably has the 80 amp hour Moll, so then look here. http://www.renntech.org/forums/index.php?s...amp;#entry88098

If you want to test your 5 year old Moll then put it on a real charger, like a 10 amp charger, not a trickle charger. Then bring it down to a parts place for a load test after it is fully charged.

But a 5 year old Moll is living on borrowed time. And sometimes the Moll goes boom....

post-4-1198517159_thumb.jpg

Link to comment
Share on other sites

Mike's guide is excellent. One thing that I would add is that if you're in the store and you see a battery that has the exact right model number but it has an "R" on it, don't get it. "R" means that the battery terminals are reversed. That means the battery cables won't reach the proper sides.

(Note that with the Optima battery, unlike with the other brands, you are supposed to get the "R" model, not the non-"R" model)

Edited by Stefan
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.