Notices
993 Forum 1995-1998

Battery Charging

Thread Tools
 
Search this Thread
 
Old Jan 12, 2007 | 06:49 PM
  #1  
Stuart993's Avatar
Stuart993
Thread Starter
Advanced
 
Joined: Oct 2006
Posts: 53
Likes: 0
From: Richland, Washington
Default Battery Charging

My battery's dead and is in need of re-charging.
I read in the owners manual "If the battery is disconnected, the data for the engine electronics stored in the control unit will be erased"
Being a real novice with this car I'm loathed to screw things up, so choose not to do this. What's the procedure for charging the battery whilst fitted in the car?
Thanks in advance.
Reply
Old Jan 12, 2007 | 06:56 PM
  #2  
DJF1's Avatar
DJF1
Addict
Lifetime Rennlist
Member
20 Year Member
 
Joined: Dec 2001
Posts: 7,116
Likes: 68
From: Burlington CANADA
Default

I've been storing the car for years and years. Just get a proper slow charger to charge the battery properly and be done with it.
Reply
Old Jan 12, 2007 | 07:04 PM
  #3  
Slow Guy's Avatar
Slow Guy
Rennlist Member
Veteran: Navy
20 Year Member
 
Joined: Jan 2004
Posts: 10,474
Likes: 140
From: NE Florida
Default

If the battery is completely dead it won't matter much if you disconnect it.

You need to charge the battery (duh!). There are ~1 amp (trickle) chargers, 2/10 amp chargers and >10 amp chargers. For a DEAD battery I would use a 2/10 charger, not a trickle charger and I would also disconnect the battery before charging. I would even consider pulling the battery to make sure no "boil over" from the charging occures inside the car. At the very least leave your trunk lid up while charging to let the charge gases escape your trunk.

Also, check the water level BEFORE charging and fill w/ distilled water if it needs any.

As far as the info stored in the DME, as long as you weren't planning on taking the car to get emmisions tested in the next few days it's not an issue, it will "re-learn" after a few drive cycles.
Reply
Old Jan 12, 2007 | 07:21 PM
  #4  
Stuart993's Avatar
Stuart993
Thread Starter
Advanced
 
Joined: Oct 2006
Posts: 53
Likes: 0
From: Richland, Washington
Default

Thanks for the information.
So, if I leave the battery fitted in the car, check the electrolye etc., connect the RED lead to the RED battery terminal, where does the BLACK lead connect to?
Thanks again.
Reply
Old Jan 12, 2007 | 07:24 PM
  #5  
Slow Guy's Avatar
Slow Guy
Rennlist Member
Veteran: Navy
20 Year Member
 
Joined: Jan 2004
Posts: 10,474
Likes: 140
From: NE Florida
Default

If the battery is being left connected in the car you could connect the black/ground to any metal part of the car, but I would connect it to the neg. term on the battery.
Reply
Old Jan 12, 2007 | 07:32 PM
  #6  
Stuart993's Avatar
Stuart993
Thread Starter
Advanced
 
Joined: Oct 2006
Posts: 53
Likes: 0
From: Richland, Washington
Default

Thanks Bill.
That's what was confusing me. The recharger manual say to connect the negative clamp to the chassis, but if it's OK to connect to the -ve terminal that's the answer.
What would be the problems is I remove the battery, apart from the radio code ?
Reply
Old Jan 12, 2007 | 08:01 PM
  #7  
gordo993's Avatar
gordo993
Rennlist Member
20 Year Member
 
Joined: Jan 2005
Posts: 1,093
Likes: 18
From: St. Louis, Missouri
Default

I think the manual is just saying that the computerneeds to re-learn the car. I just replaced my battery and had no issues.
Reply
Old Jan 12, 2007 | 08:26 PM
  #8  
DJF1's Avatar
DJF1
Addict
Lifetime Rennlist
Member
20 Year Member
 
Joined: Dec 2001
Posts: 7,116
Likes: 68
From: Burlington CANADA
Default

Originally Posted by Stuart993
Thanks Bill.
That's what was confusing me. The recharger manual say to connect the negative clamp to the chassis, but if it's OK to connect to the -ve terminal that's the answer.
What would be the problems is I remove the battery, apart from the radio code ?
Follow the manual of the re-charger. Just this morning I recharged the battery and the black goes on a metal surface and the red on the battery.
If your battery is already dead then you have to input the radio code. It makes absolutely no difference if the battery is in the car or out of it. If it makes you feel comfortable, then remove the battery and re charge it out of the car.
Reply
Rennlist Stories

The Best Porsche Posts for Porsche Enthusiasts

story-0

Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

 Verdad Gallardo
story-1

Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

 Verdad Gallardo
story-2

10 Porsche Colors That Have More Personality Than Most People

 Verdad Gallardo
story-3

Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

 Verdad Gallardo
story-4

10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)

 Joe Kucinski
story-5

Porsche Shakes Up The Nürburgring Lap Record Table Once Again

 Verdad Gallardo
story-6

6 Ways the Porsche 911 GT3 S/C Redefines Performance

 Joe Kucinski
story-7

10 Wildest Homologation Specials Porsche Ever Sold

 Verdad Gallardo
story-8

Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home

 Verdad Gallardo
story-9

10 Porsche Opinions That Can Start a Fight

 Joe Kucinski
Old Jan 12, 2007 | 08:43 PM
  #9  
Stuart993's Avatar
Stuart993
Thread Starter
Advanced
 
Joined: Oct 2006
Posts: 53
Likes: 0
From: Richland, Washington
Default

Thank you gentlemen.
Reply
Old Jan 12, 2007 | 09:01 PM
  #10  
amfp's Avatar
amfp
Addict
Rennlist Member

 
Joined: Jun 2001
Posts: 2,230
Likes: 10
Default

Also, make sure the battery vent tube is properly connected and exits the outside of the car.
Reply
Old Jan 12, 2007 | 09:15 PM
  #11  
Stuart993's Avatar
Stuart993
Thread Starter
Advanced
 
Joined: Oct 2006
Posts: 53
Likes: 0
From: Richland, Washington
Default

Vent tube?
At first glance I can't see anything. The battery installed is the non maintainable type, no way to check any electrolyte levels or anything else for that matter.
Where would I find this vent tube?
Thanks again.
Reply
Old Jan 12, 2007 | 09:25 PM
  #12  
DJF1's Avatar
DJF1
Addict
Lifetime Rennlist
Member
20 Year Member
 
Joined: Dec 2001
Posts: 7,116
Likes: 68
From: Burlington CANADA
Default

I'm mystified as well...
Reply
Old Jan 12, 2007 | 11:13 PM
  #13  
amfp's Avatar
amfp
Addict
Rennlist Member

 
Joined: Jun 2001
Posts: 2,230
Likes: 10
Default

A photo of your battery would be helpful. If it is an acid battery you should be able to check the water level. This is not for a 993, but will provide you info what I mentioned with vent tube. http://www.industryfigure.com/berkel...he/battery.htm I am just concerned if you battery lacks water, and is not vented properly it could a potential battery explosion if you charge a high amps.
Reply
Old Jan 12, 2007 | 11:31 PM
  #14  
David 23's Avatar
David 23
Burning Brakes
20 Year Member
 
Joined: Mar 2003
Posts: 936
Likes: 4
From: San Pedro, CA
Default

I have a dead Optima, my dealer is charging it (my charger indicated it was too low to charge). I was told a Battery Minder or something like it wouldn't keep it charged as Optimas required a charger to charge with 6v min. I don't know if I believe that, anyone have info on maintaining an Optima?
Reply
Old Jan 13, 2007 | 01:10 AM
  #15  
Slow Guy's Avatar
Slow Guy
Rennlist Member
Veteran: Navy
20 Year Member
 
Joined: Jan 2004
Posts: 10,474
Likes: 140
From: NE Florida
Default

Originally Posted by David 23
I have a dead Optima, my dealer is charging it (my charger indicated it was too low to charge). I was told a Battery Minder or something like it wouldn't keep it charged as Optimas required a charger to charge with 6v min. I don't know if I believe that, anyone have info on maintaining an Optima?
That's why I suggested using the 2/10 amp charger if the battery is dead. Some of the newer (gel) type batteries requre a much higher amp charger to get them charging (if they're completely discharged) and also to get them to a fully charged condition. Trickle chargers will "maintain" a gel type ok, but will not fully charge a gel.

I think there are now some trickle chargers that will maintain a gel better (Battery Tender Plus, is one I think) but most basic maintainers won't.
Reply



All times are GMT -3. The time now is 04:43 AM.

story-0
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

Slideshow: Porsche has created a Japan-only 911 GT3 Artisan Edition that blends track-ready hardware with design cues inspired by traditional Japanese craftsmanship.

By Verdad Gallardo | 2026-04-28 19:37:40


VIEW MORE
story-1
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

Slideshow: Porsche's latest electric Cayenne Coupe blends dramatic styling with supercar acceleration, turning the brand's midsize SUV into a 1,139-horsepower flagship.

By Verdad Gallardo | 2026-04-27 19:39:30


VIEW MORE
story-2
10 Porsche Colors That Have More Personality Than Most People

Slideshow: Porsche's wildest paint colors aren't just shades-they're full-blown personalities on four wheels.

By Verdad Gallardo | 2026-04-27 19:38:13


VIEW MORE
story-3
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

Slideshow: The last of the Speedsters doesn't just close a chapter, it makes quite the bold, air-cooled statement.

By Verdad Gallardo | 2026-04-22 17:55:04


VIEW MORE
story-4
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)

Slideshow: Going to a Porsche dealership may not be the dream experience you expect it to be and these are the reasons why.

By Joe Kucinski | 2026-04-21 13:54:19


VIEW MORE
story-5
Porsche Shakes Up The Nürburgring Lap Record Table Once Again

Slideshow: Porsche just proved-again-that precision engineering can outrun brute force at the Nürburgring.

By Verdad Gallardo | 2026-04-18 20:27:02


VIEW MORE
story-6
6 Ways the Porsche 911 GT3 S/C Redefines Performance

Slideshow: Six reasons why you will love the Porsche 911 GT3 S/C and 1 reason you will hate it.

By Joe Kucinski | 2026-04-14 10:21:39


VIEW MORE
story-7
10 Wildest Homologation Specials Porsche Ever Sold

Slideshow: Some of the most desirable Porsche models are those that were sold to the public solely for homologation purposes.

By Verdad Gallardo | 2026-04-08 09:54:26


VIEW MORE
story-8
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home

Slideshow: The lone BTR III-spec Targa features rare RUF engineering with a 430-hp turbo flat-six and fewer than 30 miles since its rebuild.

By Verdad Gallardo | 2026-04-06 20:03:25


VIEW MORE
story-9
10 Porsche Opinions That Can Start a Fight

Slideshow: If you want to start a debate with a Porsche friend, these 10 opinions are a great way to get started.

By Joe Kucinski | 2026-04-02 16:53:02


VIEW MORE