Replacement Battery: Not Stable in the Tray
02-14-2012, 12:21 PM
#16
Rennlist Member
Battery sizes that fit 996 (group 49 will probably need a nut under the last hole in the tray)
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
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
02-14-2012, 07:02 PM
#17
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
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
02-14-2012, 07:25 PM
#18
Drifting
Join Date: Mar 2011
Location: Bastrop By God Texas
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I went with the Duralast H7-AGM recently. It was a perfect fit and looked exactly like the OEM battery right down to the handles, except it didn't say Porsche on top of it.
It was in stock at the local Autozone.
It was in stock at the local Autozone.
04-06-2018, 10:05 PM
#19
Old thread but thought i would add to it in case anyone else is wondering about a bigger/better battery option and fitting it on the tray.. First, there is some misinfo presented in some remarks.. Odyssey battery i discovered is made in the USA . It's not a restickered, pawned off, main manufactured unit from one of the 3 big crap makers.. shamefully i guess Optima moved to mexico, which was my previous go to brand. Both are AGM type. I used the PC1350 model which is 14 inches long!.. the one gentleman absolutely did not have to resell or return his battery.. the last bracket hole is not threaded. simply do as Frank suggests. There is plenty of room under the edge of the tray to slide a nut under there and i just used the same tie down bolt. I know this topic was old, but its what popped up when i googled the question about using a larger battery in a 996, so now its updated a bit.
Good day
Good day
