Antigravity Lithium Battery experience
 

My OEM battery and starter took a crap on me, left me stranded near a restaurant where i was picking up food. It had been coughing for a while, with occasional difficult starting. When I took it for repairs, it started fine and we could not replicate the issue for a couple days. Of course, i get the car back and i get screwed

Anyways, I decided to splurge a bit on a lithium battery from Antigravity. This is totally unnecessary - you can get any battery from Walmart or an Optima Redtop for less money and it will fit and work and you'll be happy. This is in the track forum because it's probably the context where you'd want to use such an item


OEM battery is 44 lbs i believe
Redtop is 31.7 (per Optima)
Antigravity Group 51R is 8.5 lbs - this is an insane difference when you pick it up and compare it to a stock one

Other than weight, another attractive factor is the RESTART function, which basically lets you press a button and restart the battery when it ties, because it detects when it's getting low and preserves enough charge for another start

I got a package put together by phunk and CJ Motorsports, which included:

https://antigravitybatteries.com/pro...ive/ag-51r-rs/
(24 aH version) Comes with 2 keyfobs for remote reset. I personally don’t carry the keyfobs, I am OK with using the reset on top of the battery in the rare event I would even need it.

AG Lithium Battery Tracker:
https://antigravitybatteries.com/pro...acker-lithium/
Bluetooth device for monitoring your battery from your phone when in Bluetooth range.

CTEK Lithium Charger:
https://antigravitybatteries.com/pro...ek-lithium-us/

CTEK "comfort panel":
https://www.ctek.com/uk/products/car...tor-panel-1-5m
A cool inexpensive part you can optionally install. It has LED status indicators, but more interesting to me is the charger connection port it has for the CTEK charger. You could put this panel on the battery compartment cover, or somewhere in the interior, or wherever, and it allows you to plug in the charger without having to get the large alligator clips on the battery terminals.

This is an OEM battery size for a GTR, but fits snugly with the OEM tiedown, no shiftiness at all. Plenty of empty space in there for the other stuff:

Overall fit
https://live.staticflickr.com/65535/...86eeba80_b.jpg

CTEK "comfort panel" which is mainly an adapter
https://live.staticflickr.com/65535/...c840743d_b.jpg

https://live.staticflickr.com/65535/...91691d6e_b.jpg

Alligator clamps that are no longer needed
https://live.staticflickr.com/65535/...b774f08f_b.jpg

Charger. Runs to a wall socket, connects with a plug into the comfort panel
https://live.staticflickr.com/65535/...ca2079b8_b.jpg

Really not needed, just snazzy to have, a bluetooth battery health tracker:
https://live.staticflickr.com/65535/...23cac4b6_b.jpg

Remote restart fob (comes with 2). Can't imagine when this would be needed, you can just press a button on the battery, but hey . . . they look nice?
https://live.staticflickr.com/65535/...2574fe03_b.jpg

These pix have nothing to do with the battery. I'm just showing off the Zspec dress up bolts and some Z1 red silicone hoses

https://live.staticflickr.com/65535/...0dfcf314_b.jpg

https://live.staticflickr.com/65535/...c512744b_b.jpg

I really need an aluminium coolant tank and PS reservoir

Anyways, i could lie and tell you that driving home I felt a difference of 30 lbs , but you'd know its a lie. I'm fat enough to make up the diff.
It did start up noticeably stronger - turns out i had a bad ground too. Rain water from the vented hood must have ****** up my starting system, but a new ground wire and the new battery/starter solved everything. Peace of mind that i can actually start the car now

Install was an hour for the battery alone, mainly nissan made it a pain to remove multiple pop-rivets; my other specific work took a little more time.

Much thanks to phunk and spooler for the recommendation. I think only a handful of people are running lithium here; if any issues arise i will document in this thread

I am enjoying mine. The Bluetooth battery monitor is awesome. I love that feature since I don't leave mine plugged in. I pulled my battery to the front of the hold down. Works either way.

Nice purchase!

Even when you're already aware of how light it is on paper, it is startling when you lift it up, because it just doesn't even look as light as it is. I love that this is a real lightweight *automotive* battery we can use. Thanks to lithium batteries, gone are the days of resorting to compact powersports batteries with minimal amp hours and poor dependability in cars. My cars are street cars only and they absolutely have to start every time when I am out. One summer down with my AntiGravity Battery. I hope to see it last many years.

And while these batteries are not cheap, I still say it is by far the best lb/dollar ratio in weight reduction you will find for a 370z. If anyone is interested in this package, let me know, its discounted quite a bit over how it looks when you add up all those items MSRP.

Probably gonna go with a antigravity now that my Shorai has died (left the OBD reader in a few too many times lol). Granted a smaller one. Lithium is the way to go!

I would buy one again in a heartbeat with the package. Can't beat it.

I personally can't justify the cost of one of these things, but it's pretty high up there on the list of unnecessary wants. It pulls weight out of the front (ish) and kinda high up in the car too.

great write up, thanks!

Wow. the weight savings is tremendous. How long is it supposed to last (years?)

X2. Curious what the life expectancy on this type of battery is. Seems pretty awesome though.

I've been using their 20AH one with restart for the last couple years, printed an adapter to use with the stock clamp and still reach the restart button. My car has become an autoX/track only use car now, so it sits a lot on a charger between starts.

It's cheap per lb of weight lost compared to most other mods (short of stripping interior of course) and has started the car up strongly every single time.

So how is it compared to stock? I daily my Z and I have a sound system in it... would it effect my reliability at all?

It starts the car noticeably stronger than stock ever did.

Not sure how it affects sound, not my forte. Contact phunk tho, he’s the man

I've got the ATX20 and so far so good. I love it

wait....$660 for a battery...? :icon08:

Wait until you see what people spend on CF parts to get only a couple lb of weight reduction!

Simple question, can you just buy the battery and bolt it straight in? Group buy charles?

Yes you can just swap it right in, nothing has to change. I am already selling them at a discount from the prices shown, no GB needed!

If you price the kit on AntiGravity's site it adds up to 1k.

$660 for a part that has endurance of a normal battery while cutting all that fat, with added fancy tech. Race car stuff without “because race car” sacrifice. That’s never gonna be cheap.

Not arguing about subjective views, but....people spend $200+ on shift knob, more on fake wheels....in the grand scheme, I don’t think this battery’s cost is bad at all.

Look up a guy named Robert (or Bob) Linton, IG robertlinton1.

TLDR: he has commissioned beryllium calipers for a couple of his Porsches. His pursuit for street car weight saving while retaining OEM (or better than OEM) functionality and fitment knows no bound, literally.

Some cars leave the factory with a lithium ion battery these days, such as the BMW M4:

https://www.atlantabmwparts.com/oem-...ry-61218047221

Look at the price over there, ouch. Check out the amp hours though, niiice.

and I definitely did not give phunk $1k for this . . .

his prices are amazeballs

Bite the pillow on that. They're going in dry. :eek:

LMAO, I don't understand logic of some bit then again I am not logical when it comes to my Z. That said the battery is less than a set of tires and last you longer than four sets of tires!

Sent from my SM-G965U using Tapatalk

Lithium battery added to the build sheet :tup:

I mean, I've already spent thousands on parts that probably won't ever be installed on my car so I can't say shìt about the cost :rofl2:

The value of my yet-to-be-installed parts far outweighs my installed parts

OptionZero - How is this battery treating you?

awesome

push-button restart is a nice feature, i had the car sitting for a while not plugging into the tender and the charge ran down. Convenient to just hit it and start the car.

weight savings are incredibly if you pick up the lithium and a normal battery consecutively

The Phunk package includes bluetooth monitoring to your phone so you can check the power level easily

one of my favorite mods

highly recommend

I have had mine longer than he has had his and I have had no issues.

Interesting. Thank you for the info.

send Phunk/CJM an email if you're interested

he will get you taken care of

I've been using an ATX12HD RS for years.
Other friends plus our E46 M3 have used an ATX20RS, without any issue for a few years.
Still highly recommend!

The batteries last at least as long as lead acid with the low usage I put them through and the restart has saved me tons of time with how frequently I forget to trickle charge.

I have never hooked my 370ztt up to a battery tender. I do watch the bluetooth charge module to tell me when I need to go for a drive.

So the battery showed up last night and threw it in the car. The weight difference is comical. The Antigravity battery is so light it almost feels fake. But so far it works great. I just hope my wife never finds out what i paid for this battery :eekdance:

I opted for the 30Ah battery so that's a difference of 29.15 lbs.

yeah, the physical dimensions are only a bit smaller but when you pick it up it's shocking how much lighter it is

damn thing might get yeeted if you aren't careful lifting it the first time

is there another part of the car where you can lose 30 lbs that easily?

If only I can lay off those burgers.. :tup:

You had no issues of it moving around out on track? I tightened it down as much as I could. Your pictures look the same as mine. There is a good 2-3 inch gap in front of the battery.

I have been working on my Z lately and have been redoing my battery compartment. As my anti-gravity is still going strong in my GT-R, and my Z's DieHard battery has failed, I put my stock GT-R battery in it. I am hoping to have some time to make a simple mount kit for R35 sized battery cases into the 370z in the next few weeks. I am not aware of anyone having issues with the R35 size Anti-Gravity I sold them sliding around, probably partly because its so light, but I have been wanting to get it fixed solid and proper in there all this time.

A simple 3D printed plastic tray insert and maybe even a top piece will work. Suprised no one has mentioned it. is it expensive? or readily not available?

No, these days 3d printing simple parts like that is very cheap and very available. You can actually just brace it with a small piece of wood or MDF or use threaded rod and nuts for a tie down. There is no shortage of DIY ways to keep a battery stationary.