Laguna_Dude

Thank you! When you say "Porsche tool" do you mean the maintenance charger or settings in the car?

Sword_of_the_Spirit

The Porsche Scan tool PIWIS. There maybe other tools such as the Durametric that may have the function. I'm sure they'll chime in shortly as I only have specific tooling for my wife's Cayenne (most modern Pcar at the moment; a/c cars use the Hammer). Back in the day though, we went through a private shop for the .2 when the family briefly had one. I searched for a used oe battery that eventually failed as was common (unknown to me at the time). Had to switch back to agm. Others can chime in about that experience I'm sure.

What's your usage though? Litho's have some special treatments that are needed outside of the agm/LA types.

Laguna_Dude

this is for a car in my collection that will be driven 2-5x per month max. I was planning to use a maintenance charger to keep voltage stable when sitting. would have gotten the 24 ah but they were backordered so got the 30. not worried about the 2-4lb difference. Just did more digging and seems to be a straight replacement with no programming, etc needed. Thank you!

Khloesdad

Love my Anti Gravity. Love that it will shut itself off if it gets past a certain amount of voltage drop and I will not need to jump start it.

TB993tt

I have had the Anti Gravity H6 60AH battery in my 997GT2 for over a year, the only issue I noticed is how much faster it cranks the engine compared to the old 80AH lead lump.

Sword_of_the_Spirit

It’s because of the pulse amperage. Even my little 24C has around 420.

When I was referring to H4’s, they were the AGM/LA type.

Earthx or Voltphreaks are good options as well. They’ve been around for sometime. I’ve been using ETX24C’s Litho’s since ‘16 with not an issue.

Antigravity

Hi Laguna, yes, you should be able to just drop this in and go.
Best regards,
Chad
chad@antigravitybatteries.com

Laguna_Dude

Awesome! Thank you!

Laguna_Dude

I ordered the battery Thursday night and it arrived Saturday. Was super easy to install and could not believe the weight difference and savings. Insane!! Seems like a no-brainer upgrade. Super satisfied with my purchase!

cds4402

Because it’s a street car. Not a race car. And nothing sucks worse than having a battery failure in July at the grocery store after you just bought a tub of ice cream.

Laguna_Dude

the tech is now to point where i don't see these as being less reliable. I could not believe the weight savings. while they are street cars, they are sports cars and obviously lighter is better for sport driving.

Mr. Adair

This^

Because all of you warm weather fellas don't have to start your GT cars at 10 degrees. And arguing over battery weights is hilarious. Cranking amps are king.

Laguna_Dude

i agree. but it is a meaningful savings. and op was claiming they won't start in summer or warm weather. i think these new batteries will work fine. and i dont know anyone who keeps their RS outside in dead of winter in Montana. It's not a ford pickup. i am happy with my purchase but to each their own really. everyone has a different reason and purpose for things. i wanted the weight savings. and it cranks up as fast or faster vs. the heavy lead-acid that it replaced. 992 GT3 comes with LiFePO battery as standard.

Sword_of_the_Spirit

A Litho will outpace a 1 for 1 AGM or Wet Cell any day. Pulse Crank Amps for the win.

TuonoR

I have a Voltphreaks VPH-900 in a GT3. Battery is around 7 lbs with 33 Ah of capacity / 520 CCA. It isn't a direct fit in p-cars but given the small size, its easy to fab / frankenstein something (this one courtesy of a spare rennline battery mount baseplate and some mcmaster-carr hardware). Total weight including the mount is 9.25 lbs.

I also have a 30 Ah Antigravity in a 964. I like the drop-in shape / sizing and the technology seems more developed. OTOH, hard to argue with the reliability of a hardwire low voltage cut-off reset on the Voltpheaks (vs wireless for Antigravity). And the Voltphreaks also has a integrated battery cut-off switch.

So far the low voltage cut-offs in both have worked flawlessly (ie when they've kicked in there was enough charge to easily start the car after a reset). My 997 GT3 can sit for 7 days before the Voltphreaks cut-off kicks in but I usually have it on a tender or use the battery cut-off switch if its going to sit.