What Antigravity Vehicles Taught Me About Batteries, Rooftop Tent Awning Brackets, and Wax Removal

It Started With a Hood That Wouldn't Close

I've been handling vehicle accessory orders for eight years. I've personally made—and documented—14 significant mistakes, totaling roughly $15,000 in wasted budget and rework. I say 'significant' because I do not count the two times I ordered the wrong trim clips. That was just Tuesday.

Now I maintain our team's pre-build checklist, and I'm going to walk you through the project that made me create it. It started on a Thursday in September 2022, with two overland vehicles, a client deadline, and a hood that would not close.

Why Lithium Made Me Rethink Everything

I came from the lead-acid world. For years, my battery rule was simple: match the group size and CCA, tighten the hold-down, move on. That rule worked for conventional batteries. It does not work for lithium. The industry is changing, and my old checklist needed to change with it.

People think lithium batteries are expensive because they're a premium upgrade. Actually, the expensive part is owning a battery that does not fit, loses you shop time, and shakes client confidence. The causation runs the other way: rushed decisions and outdated assumptions cost more than the battery ever will.

The fundamentals have not changed—batteries still need a secure mount, clean terminals, and correct voltage—but the execution has transformed. Lithium has different terminal layouts, different charging profiles, and different storage behavior. Treating it like a lead-acid battery is a mistake.

The Antigravity Battery Box Was Lighter Than I Expected

When the first Antigravity battery arrived, I lifted the box and thought it was empty. It weighed roughly half of the AGM battery we were replacing. That is a big deal for vehicle weight distribution, especially for overland rigs with rooftop tents and tools in the rear. Lighter batteries make installs easier too. Instead of wrestling a 50-pound battery into a tight tray, I could guide it in with one hand.

But lightweight made me careless. In my head, 'this is easier to install' turned into 'this will fit because it is the same group size.' It did not.

Mistake #1: I Ordered By Group Size Alone

The client asked for Antigravity lithium batteries in two vehicles. I had read enough about the brand to know the weight savings and the built-in jump start feature were real. What I did not do was check the actual fitment notes for the specific vehicle.

The battery looked identical in the product photo. Same group size, similar terminals, same color case. Then I tried to install it. The positive terminal was close to the fender. The hold-down bracket did not line up. The hood latch was hitting the top of the battery case.

According to Antigravity's published fitment notes, terminal orientation and case dimensions can vary by application, even within the same group size family. I did not look at that data until after the failed install. That is on me.

I'm gonna be honest: I was annoyed at the battery at first. But the battery was fine. The problem was my 'group size equals same fit' assumption. That assumption is a 2020 move. By 2025, with multiple battery chemistries and terminal layouts, you have to check dimensions, terminal orientation, and the exact mount for the vehicle.

The Two-Hour Decision

Had two hours to decide before the client needed the vehicle back. Normally I'd order both battery options and test fit each one, but there was no time. I went with the spec sheet and sourced a temporary AGM from the local parts store just to keep the project moving. That fix cost us a full day and an extra $200. In hindsight, I should have pushed back on the timeline and requested a fitment photo from Antigravity's tech support. But with the client waiting, I made the call with incomplete information.

The temporary AGM worked, and that made the problem worse. It confirmed my old habit, so I almost repeated the same mistake on the second vehicle. The only thing that stopped me was a 10-minute phone call with Antigravity's support, who sent a fitment diagram and a note about the correct terminal orientation for that chassis. I should have done that before I ordered.

The App That Caught a Problem

After that mess, I finally downloaded the Antigravity app and paired the battery. The app showed resting voltage and estimated state of charge. I did not fully trust it at first. I have seen phone apps be wrong before. I would rather trust a multimeter and a load tester.

Then, in November, the app flagged a slow voltage drop on one of the vehicles we'd just finished. We tested the draw and found a 60mA parasitic load from a relay that had not switched off. A conventional battery might have survived, but it would have been marginal by morning. The lithium battery handled it, and the app gave us enough warning to find the problem before the vehicle stranded anyone.

Why does this matter? Because the easiest way to lose a client is to hand over a vehicle that is dead when they try to leave. Dodged a bullet there. We were one bad morning away from an embarrassing tow.

Rooftop Tent Awning Brackets: The Second Mistake

The same project included rooftop tent awning brackets. The client's roof rack was not from the tent brand, so we ordered a universal mount kit. The brackets looked solid after install. The first rain said otherwise.

Water collected between the bracket and the rack rail, and the client sent us a photo with a comment asking if that gap was supposed to do that. It was not. That mistake cost $380 in replacement parts plus a 3-day delay. It also taught me that universal mounting is a starting point, not a solution. You mock it up with cardboard, measure twice, add a rubber shim, and then test it with a hose before the client sees it. Check the fit. Simple.

A Mitt Car Wash and the Best Homemade Car Wax Remover

After the bracket fix, I did the final detail myself. I gave the rig a proper mitt car wash—two buckets, clean microfiber mitt, pH-neutral soap. That is where I found white wax residue on the hood and trim. The previous detailer had left it behind, and it looked terrible under the sun.

I tried a clay bar and a commercial wax remover. Neither touched it. Then I remembered a trick from an old body guy: the best homemade car wax remover I have used is a 50/50 mix of isopropyl alcohol and warm water with one drop of dish soap. It cut through the old wax without dulling the clear coat. I should add that I tested it on a lower panel first. I do not recommend going straight at a hood with alcohol. But in that specific case, it saved the delivery.

So glad I caught it before the client did. Almost handed over a vehicle with white streaks on the hood, which would have been embarrassing after everything else.

Our Pre-Build Checklist Now

After that project, I built a checklist that the whole team uses. It is not fancy. It just forces us to slow down.

• Verify battery group size, terminal orientation, and hold-down fit before ordering. Do not rely on group size alone.
• Pair every new battery with the Antigravity app and record the resting voltage after install.
• Mock up rooftop tent awning brackets with cardboard or foam before drilling anything.
• Do a final mitt car wash and inspect for old wax residue under bright shop lights.
• Test any homemade cleaner on a hidden area first.

In the 18 months after that project, this checklist caught 47 potential issues before vehicles left the shop. That sounds high, but most were small: a loose terminal, a bracket that would have rattled, a voltage reading that did not match the app. We caught 47 potential problems because we are actually looking now.

What 'Antigravity Vehicles' Means to Our Fleet

When I call our rigs 'Antigravity vehicles,' I mean the vehicles in our small fleet that run Antigravity lithium batteries. I want to say we've got six, but we just finished number seven last week—so six on the road and one still in the shop. The group sizes range from small U1 units to H6/H7 truck batteries. Every one of them is monitored through the app.

The built-in jump start feature has not been needed yet, but it is a nice safety net. What has been more useful is the data. The app shows trends over time, so I can catch a slow drain before it becomes a dead vehicle. That is not magic. It is just visibility, and I wish I had used it from day one.

I do not think lithium is magic. It still needs a secure mount, clean terminals, and correct fitment. The fundamentals have not changed. The execution has transformed. That is the lesson from the two mistakes, the bracket leak, and the wax disaster: update your assumptions, use the tools available, and check everything like you've been burned before. I have.

None of this is groundbreaking. That is the point. The expensive mistakes were not caused by complicated failures; they came from skipping basic checks. I've probably lost some money for every lesson, and I'd rather you not repeat them.