DavidSB

My batteries now 6 years old and beginning to fail. Any recommendations for a maintenance free type replacement? Sears has a Diehard AMG size 94 with a 36 month warranty for $180.
Thanks,
David

cfjan

I bought one from Costco a couple of years ago... Still works.. !

edgy

I just did mine too.. as its only a standard lead calcium I just got an aftermarket equivalent of the same specification as OEM. Sealed no maintenance.

christallon

Interstate 48/H6 solid battery. 36 month then another 24 months prorated warranty. $150

PCA7GGR

WallyMao Everstart Platinum AGM H7 (made by Johnson Controls)
800 CCA, 140 min reserved capacity, 47lbs - $150
5 year replacement (3yrs free/2yrs pro-rated) and there are stores evewrywhere
Free tests and free installation

lax01

Nobody suggests $1k+ LION battery?

Blitz128

Any lighter weight batteries work and still capable of supporting operation etc of all the standard equipment of a street GT3 car ?

rodneyr

I was thinking about a lite weight battery as a replacement since mine was getting old. www.voltphreaks.com. They make lithium ion batteries for street/racing applications. I was looking at the VPH750.

My thinking this would be an easy way to save 20 lbs without really any modifiction to the car. The battery is $899 + you need to manfacture a bracket. I am suprised I have not heard more about the battery on the forum.

I have only seen one in use for a 997.2 GT3 and the owner had a cool suit + data acquisition as part of the setup.

Anyone else have experience this this company/battery?

4porsh

I went with the Rennline/Odyssey 925 and battery mount kit. http://www.rennline.com/Battery-Moun.../products/235/

If car is driving everyday, than no need for battery tender. If the car sits for two days or more I hook up the battery tender. Works great for me.

Dervish

My Voltphreaks VPH900 fitted using someone else's bracket design





Excellent battery, used all through winter with 7 days between starts and no problems. Only 1 time did it go into power save mode but not a problem as I've routed the remote into cabin. 1 quick push of the button, battery back on and enough power to easily crank.

Contact Tony @ Voltphreaks for any questions, great customer service.

powdrhound

Been using the Braille 21 lb battery for over a year and it's been fantastic. Can't tell any difference from the heavy stock battery in cranking power. At 21lbs, it's 26 lbs lighter than the stock battery.. I think I paid about $160 for it..

christallon

I now have battery envy....Thanks Powderhound... What is the warranty on the Braille unit? Looks great, especially with that minty factory tray and hold down...

powdrhound

I have the warranty paperwork at home. I bought it at Jegs. I'm sure you can look on their website and see what it says. I cleaned the battery tray and resprayed it black to give it a new look. To attach it, I drilled a hole in it and JB welded some blind nuts from the bottom. Get some long bolts at ACE hardware and you can use a 1/2" aluminum bar stock for the upper brace. Easy, light, and simple...

christallon

Thanks man. I really like this. Wish I'd known about this 2 weeks ago.

David A

If you get a Die hard E2 group 47 it will fit in the OEM battery tray in the last hole. It's the same size as the battery they get in EU. I had it on my GT3, no problems and Sears will give you a lifetime warranty too