GT 4 Battery size
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Instructor
Joined: Jul 2011
Posts: 106
Likes: 16
GT 4 Battery size
I see that I have an H5 size series battery in my GT4. I am wondering if all the GT4's came with this smallest size battery? If you look for replacements, every site recommends an H8 which is several inches longer and of course much heavier. Maybe Porsche used different batteries depending on the climate in the sales location? My H5 is nearly five years old and still functioning perfectly. I do keep it garaged and on a CTEK when not in use. Can any of you battery knowledgeable guys offer an argument why more cranking amps and amp hours are needed? Weight is no big deal to me as I'm not seriously tracking, but why add the giant battery if not needed?
Rennlist Member
Joined: Mar 2016
Posts: 494
Likes: 179
From: Athens, GA
I see that I have an H5 size series battery in my GT4. I am wondering if all the GT4's came with this smallest size battery? If you look for replacements, every site recommends an H8 which is several inches longer and of course much heavier. Maybe Porsche used different batteries depending on the climate in the sales location? My H5 is nearly five years old and still functioning perfectly. I do keep it garaged and on a CTEK when not in use. Can any of you battery knowledgeable guys offer an argument why more cranking amps and amp hours are needed? Weight is no big deal to me as I'm not seriously tracking, but why add the giant battery if not needed?
Rennlist Member
Joined: May 2013
Posts: 1,607
Likes: 133
From: Louisville KY
Mine had a H5 in it (not sure if it was OEM or the 1st owner went smaller/less weight) but I replaced it with a H6. I had a light weight battery in my ‘07 Cayman S and it was very iffy in cold wx or the car sat for a few days. I never noticed the 30# savings anywhere on the track. But I did worry about the car starting in hot and cold conditions, especially when on the trailer with the tire rack above the frunk which really complicates things, even more so if the parking brake is set and the battery is dead. Ask me how I know?😭
