Lithium Battery?
Lithium Battery? Has anyone installed a lithium battery in their Firebird or Camaro up front in the stock location?
Have you had any problems?
I'm looking at the Antigravity ATX-30-HD. Weight is about 9 lbs. 12,8 Volts 970 CCA. 24 Ah (48 Ah equiv for lead-acid).
Thanks,
John
Have you had any problems?
I'm looking at the Antigravity ATX-30-HD. Weight is about 9 lbs. 12,8 Volts 970 CCA. 24 Ah (48 Ah equiv for lead-acid).
Thanks,
John
I'm wondering if anyone has used a lithium battery in our 4th gen f-bodies.
John
Registered User
Joined: Jan 2026
Posts: 2
Likes: 0
Yes — the Antigravity ATX‑30‑HD and similar lithium batteries fit up front in the stock location on Firebirds/Camaros with no issues as long as:
• The physical size fits your tray (some models need a slight tray mod).
• You have a proper ground strap and good chassis ground (important with lithium).
• You use a battery isolator or jump start terminal (lithium can’t be jumped like lead‑acid).
People run them with no problems — lighter weight, strong starts, and no degradation with heat as long as you keep them charged. Just avoid letting it sit discharged for long periods.
• The physical size fits your tray (some models need a slight tray mod).
• You have a proper ground strap and good chassis ground (important with lithium).
• You use a battery isolator or jump start terminal (lithium can’t be jumped like lead‑acid).
People run them with no problems — lighter weight, strong starts, and no degradation with heat as long as you keep them charged. Just avoid letting it sit discharged for long periods.
Yes — the Antigravity ATX‑30‑HD and similar lithium batteries fit up front in the stock location on Firebirds/Camaros with no issues as long as:
• The physical size fits your tray (some models need a slight tray mod).
• You have a proper ground strap and good chassis ground (important with lithium).
• You use a battery isolator or jump start terminal (lithium can’t be jumped like lead‑acid).
People run them with no problems — lighter weight, strong starts, and no degradation with heat as long as you keep them charged. Just avoid letting it sit discharged for long periods.
• The physical size fits your tray (some models need a slight tray mod).
• You have a proper ground strap and good chassis ground (important with lithium).
• You use a battery isolator or jump start terminal (lithium can’t be jumped like lead‑acid).
People run them with no problems — lighter weight, strong starts, and no degradation with heat as long as you keep them charged. Just avoid letting it sit discharged for long periods.
I was worried about the under hood temperature getting too hot. The AntiGravity manual states that 120* is the max operating temp.
John
TECH Resident
Joined: Jul 2009
Posts: 751
Likes: 322
The claims on those batteries are ridiclious. There isn’t a battery in existance that can be compared to a true 900CCA+ Lead acid bat that weighs 7.8lbs! I’d save yourself the headache and expense if you aren’t class racing where every tenth of a second counts.
The way get those “970 amp” rating is a direct short across the leads. It may peak 970 amp for a millisecond, but that doesn’t translate to 10-20 second burst current used to crank a motor. 8lbs worth of Lithium cell can’t crank diddly as far as doing work and moving heavy rotating assy.
The best battery chemistry to date for power to weight is the LIPO cell. The ones used in RC hobby cars. Which may be what they are running. Would need to see inside to be sure.
Its also priced ridicliously. Id stay FAR waay from that or anything claiming anywhere near those specs. You can put together a more capable cranking amp battery with actual useful cranking amps with $160 worth of LIPO RC cells. Which may be whats inside those. Check oyutube for lithium battery tear downs. They always find mickey mouse crap inside them.
The cost vs the weight savings isn’t worth it IMO. The best power vs price vs performance I’ve found to date is the Deka ETX 30L waverunner bats. They are 23lbs and crank a solid 430+ for 10 second bursts. Which is much better than some full sized car bats claiming 900CCA+ perform at twice the weight. This bat is also not dangerious and has a great service life and price. As an example the Odyssey “925” CCA rated battery did 330a for a 10second run on my tester. This Deka blew it away cranking more than advertised and was 7lbs lighter... and cost less!
https://www.techbatterysolutions.com...tx30l-battery/
The way get those “970 amp” rating is a direct short across the leads. It may peak 970 amp for a millisecond, but that doesn’t translate to 10-20 second burst current used to crank a motor. 8lbs worth of Lithium cell can’t crank diddly as far as doing work and moving heavy rotating assy.
The best battery chemistry to date for power to weight is the LIPO cell. The ones used in RC hobby cars. Which may be what they are running. Would need to see inside to be sure.
Its also priced ridicliously. Id stay FAR waay from that or anything claiming anywhere near those specs. You can put together a more capable cranking amp battery with actual useful cranking amps with $160 worth of LIPO RC cells. Which may be whats inside those. Check oyutube for lithium battery tear downs. They always find mickey mouse crap inside them.
The cost vs the weight savings isn’t worth it IMO. The best power vs price vs performance I’ve found to date is the Deka ETX 30L waverunner bats. They are 23lbs and crank a solid 430+ for 10 second bursts. Which is much better than some full sized car bats claiming 900CCA+ perform at twice the weight. This bat is also not dangerious and has a great service life and price. As an example the Odyssey “925” CCA rated battery did 330a for a 10second run on my tester. This Deka blew it away cranking more than advertised and was 7lbs lighter... and cost less!
https://www.techbatterysolutions.com...tx30l-battery/
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A little late to the party here but I've had two different Anti Gravity ATX30 batteries in two different vehicles both with 6.2 LS motors, one an F-body in stock location and another in a kit car...... These batteries are fantastic & while I've never "tested" the CCA they turn the motor over fast in every weather condition I've had them in and work fine with standard alternators. There is a special Ctek 110V charger recommended for first charge and maintenance charging afterward but I've found with the Re-start system thats not needed, If the car has sat for a very long time the battery will dis-connect, just hit the re-start button and your good. If I recall Darth had one on his High compression 434 and also gave high marks.
A little late to the party here but I've had two different Anti Gravity ATX30 batteries in two different vehicles both with 6.2 LS motors, one an F-body in stock location and another in a kit car...... These batteries are fantastic & while I've never "tested" the CCA they turn the motor over fast in every weather condition I've had them in and work fine with standard alternators. There is a special Ctek 110V charger recommended for first charge and maintenance charging afterward but I've found with the Re-start system thats not needed, If the car has sat for a very long time the battery will dis-connect, just hit the re-start button and your good. If I recall Darth had one on his High compression 434 and also gave high marks.
A little late to the party here but I've had two different Anti Gravity ATX30 batteries in two different vehicles both with 6.2 LS motors, one an F-body in stock location and another in a kit car...... These batteries are fantastic & while I've never "tested" the CCA they turn the motor over fast in every weather condition I've had them in and work fine with standard alternators. There is a special Ctek 110V charger recommended for first charge and maintenance charging afterward but I've found with the Re-start system thats not needed, If the car has sat for a very long time the battery will dis-connect, just hit the re-start button and your good. If I recall Darth had one on his High compression 434 and also gave high marks.
Thanks,
John
Def. not claiming they can't crank a motor. Just that they don't meet the claimed specs and they are WAY overpriced. I can start a car with a $30 LIPO battery very easily. And its less than 2lbs. Good Example.
https://www.youtube.com/watch?v=sX37v8UZnuA
https://www.youtube.com/watch?v=sX37v8UZnuA