sparks259

Interstate.

zman2002 C4S

The Duralast I bought has a pretty tiny vent hole (94R-DLG). The tube fits in but I had to really force it in. I assume this is normal. The old battery had an oval shaped vent tube on the back that had an adapter to fit.

Dharn55

PepBoys has a Bosch battery tha t is basically the OEM with a Bosch label. About $115-$125. Exact fit.

jdog

Made by East Penn/DEKA.

http://napaonline.com/Catalog/Result...10&Ntk=Keyword

Peter 642

What the heck is with the battery posts? This is the third, no fourth one this week (today)!
Winter kill batteries? I guess the cars get used less?
Huh?

Thundertub

I stand squarely in the middle of the fence on this one. Interstate, about $125 out the door, installed AT the dealership, BY my dealership, recommended BY my dealership. I didn't even have to recode my radio when they were done. They took care of the discard (a 7 year old Interstate), and washed and vacuumed my car before handing me the keys, an hour after I arrived.

As always, not all Porsche dealerships are created equal. Your experience may vary.

SSST

Got mine at autozone for about $110. It's exactly like the one that came out of it except it doesn't have Porsche printed on top of it.

It starts the car and everything. Just like the Porsche battery.

fpb111

Batterys that fit:
https://rennlist.com/forums/996-foru...t-battery.html

I prefer AGM (Absorbed Glass Mat) Gel type batteries No vent no spill
I replaced an Interstate MTP-H7 With a Braille 7548 AGM battery direct replacement.

Braille AGM B7548 battery group 48
BCI Group: [?]Group 48
Length:10.9" (277mm)
Width:6.8" (173mm)
Height (without posts):7.5" (191mm)

http://www.braillebattery.com/index....tteries/b7548#

Interstate sizes that fit 2003 996

Group Interstate number Dimensions L x W x H Posts
48 MTP-H6 10-15/16 x 6-7/8 x 7-1/5 Top
94R MTP-H7 12-3/8 x 6-7/8 x 7-1/5 Top
49 MTP-H8 13-15/16 x 6-7/8 x 7-1/5 Top

Surfer161

my dealer sent me to Sears. Go figure. 5 yr warantee

82_930

When researching batteries, I discovered that every battery brand in the world is made in one of 3 factories... so just look for the best price and longest warranty that you can find. Do not buy based on advertising because it is all just hype.

Installed the Group 49 battery (Sears Diehard Advanced Gold AGM battery, 850 CCA)... it takes up the entire tray and the retainer attaches to the last hole (the one without the threaded pre-attached nut).

What I did to get around that was to take off the battery tray, put a stainless steel bolt with a star washer through the bottom of the hole so the bolt/star washer was upside down, and then re-installed the battery tray. I bought the locknut, washer and bolt at Home Depot

Next, I put in the battery and battery retainer and fastened it down with a stainless steel nut with a nylon insert (or lock nut).

The battery tray allows for a open ended wrench to be slid under to hold the bolt while you ratchet down the nut. You will have to remove the black panel that is next to the battery on the passenger side of the car (very simple, just one torx screw) to get your hand in there with the open ended wrench.

Perfect fit, and a 1-2-3 solution for the bolt hole! Total install time = 4 minutes

Hurdigurdiman

That was going to be my suggestion . Same battery exactly and just over $100 with vent on side Bosch with a 3 yr free replacement from Pepboys.

tedespa

I was quoted $395 by my Porsche dealer today for a battery and 1/2 hour of service to install.
Found a direct replacement for my 2001 911 Carrera at Pep Boys for $129 installed. It is a Bosche and has a 3 year replacement warranty and a 96 month prorated warranty. It was a Group 91 size.

LordVicious

Pretty much any group 48/49 (euro H6) battery will work, but I HIGHLY recommend going with an AGM battery. I've just seen to many Interstate and Duralast batteries die early to ever trust these brands again.

perryinva

I've had the big Bosch from Pep Boys in mine for about 5 years now. Flawless. I give a rats *** about the extra weight there. I want the car to start effortlessly every time I need it. It's sat for weeks, and never an issue. I've had many Duralast batteries over the years, and I agree, they Dontalast. They are just cheaper.

djantlive

most batteries are all made by the same factory. i had a walmart one. was the cheapest.

make sure you connect the vent tube. you don't want a battery to explode. also wear eye protection and long sleeve in a cool, ventilated area when working on batteries