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AG-U1R-20-RS Lithium Battery w/ Wireless Jump Start

Name: AG-U1R-20-RS Lithium Battery w/ Wireless Jump Start - Wyld Performance
SKU: antAG-U1R-20-RS
Price: 619.99 USD
Availability: InStock
Rating: 5.00 (2 reviews)

SKU: antAG-U1R-20-RS

Rated 5.00 out of 5 based on 2 customer ratings

(2 customer reviews)

Original price was: $749.99.Current price is: $619.99.

In stock

9 in stock

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Antigravity U1/Group U1R Lithium Auto Battery w/Re-Start (Part #antAG-U1R-20-RS)

A Battery That Won't Leave You Stranded

You know the feeling. You leave the lights on. Or you leave the key in the ignition. Come back. Nothing. Dead battery. You need a jump. You need help. You are stuck.Antigravity fixed that.This is the Antigravity U1/Group U1R Lithium Auto Battery. Part #antAG-U1R-20-RS. With Re-Start technology. For right-side positive terminal applications.

What Is Re-Start?

The battery has a built-in Battery Management System (BMS). If you drain the battery, the BMS shuts it down before it goes dead. Saves a small amount of energy. You press the button on the wireless key fob. The battery wakes up. You start your car and drive away. No jumper cables. No push-start. No waiting for a friend.

Why Lithium?

This battery weighs only 7.25 lbs. That is up to 30 lbs lighter than a stock lead-acid battery. 70% lighter. Makes a difference in handling. Braking. Acceleration. It also has 925 cranking amps. More power than a stock battery. Starts your car faster. Works in cold weather. Works in hot weather.

Built-In Battery Management System

The BMS protects the battery. Prevents over-discharge. Prevents over-charge. Prevents short circuits. Balances the cells. Extends the life of the battery. Antigravity says 7 to 9 years. Much longer than lead-acid.

Features & Benefits

Re-Start Technology: Built-in wireless jump-starting. Key fob included .
Ultra Lightweight: 7.25 lbs. Up to 30 lbs lighter .
925 Cranking Amps: Starts most engines. Even high compression motors .
Group U1/U1R Size: Direct OEM replacement. Same dimensions .
Full Battery Management System: Over-discharge, over-charge, short circuit, thermal protections .
Long Life: 7 to 9 years expected. 2-3x longer than lead-acid .
Vibration Resistant: No acid to spill. No liquid to leak .
Threaded Terminals: M6x1 . SAE terminal adapters included.

Vehicle Fitment

Compact U1 and U1R case size.

Dimensions: 7.75 x 5.2 x 7.3 inches .
Weight: 7.25 lbs .

Fits many applications:

Mazda Miata (NA/NB)
Some UTVs
Lawn tractors
Farm equipment
Small generators
Small tractors

Important Notes

Only use a Lithium LiFePO4 charger. Do not use a trickle charger or lead-acid charger on this battery .
Do not use in total-loss electrical systems. This battery is not designed for sustained discharge .
Do not use in stop-start systems. Smart charging systems can trigger the Re-Start shut-off .

FAQ

How does Re-Start work?

A: If the battery is drained, press the button on the key fob. The battery wakes up. Start your car. Drive away. No jumper cables needed .

How much does this battery weigh?

7.25 lbs. That is up to 30 lbs less than a lead-acid battery .

Does this battery have high cranking amps?

925 cranking amps . Starts most engines easily.

Can I use a regular battery charger on this?

No. Only use a Lithium LiFePO4 charger . Trickle chargers can damage the battery .

Will this fit my Mazda Miata?

If your Miata uses a U1 or U1R battery, yes. This is a direct replacement for the stock size .

925 cranking amps: 70% lighter than lead, you can drop up to 30 lbs instantly
More resilient to vibration than lead/acid — shock and vibration resistant with no liquids or acid inside to spill.
OEM U1/U1R case size — direct drop-in replacement, no modifications needed

2 reviews for AG-U1R-20-RS Lithium Battery w/ Wireless Jump Start

Rated 5 out of 5
Tyler Mitchell – April 29, 2026
Lightweight lithium power with built-in restart protection this is the smartest battery I’ve ever owned.
Rated 5 out of 5
Skotty – May 13, 2026
Incredible battery. The Re-Start is not a gimmick it actually works and has saved my ride twice.

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AG-U1R-20-RS Lithium Battery w/ Wireless Jump Start