Antigravity Q85/Group 35 Lithium Car Battery w/Re-Start

AG-35-40-RS Lithium Battery with Wireless RE-START

The AG-35-40-RS is a lightweight Antigravity Batteries lithium starter battery built in the Q85 / Group 35 case format. It combines 40Ah capacity, 1500 cranking amps, an advanced battery-management system, and wireless RE-START technology for dependable starting power in a compact package.

Key Features

• LiFePO4 construction reduces weight compared with conventional lead-acid batteries
• 40Ah capacity and 1500 cranking amps
• Advanced BMS protects against over-discharge, over-charge, thermal extremes, and short circuits
• Wireless RE-START reserve power can be activated with the compatible key fob
• Low self-discharge for performance and enthusiast vehicles

Fitment

Confirm battery tray dimensions, terminal position, polarity, hold-down design, and vehicle charging-system compatibility before ordering. Vehicle options and aftermarket electrical loads can change battery requirements.

Specifications

Whats Included

• One Antigravity lithium starter battery
• Wireless RE-START remote
• Manufacturer documentation

About Antigravity Batteries

Antigravity Batteries develops lightweight lithium power products for automotive, motorsports, powersports, and specialty applications. The AG-35-40-RS uses the companys integrated safety and reserve-starting technology to deliver high cranking output with less weight than a comparable lead-acid battery.

Related Parts

• Shop all Antigravity Batteries products
• Antigravity Bluetooth Battery Tracker
• Antigravity Battery Terminal Covers

Frequently Asked Questions

What is the AG-35-40-RS?

It is a Q85 / Group 35 lithium starter battery with 40Ah capacity, 1500 cranking amps, BMS protection, and wireless reserve-starting capability.

Will it fit my vehicle?

Fitment depends on case size, tray dimensions, hold-down style, terminal position, polarity, and charging-system compatibility. Compare every specification with the original battery before ordering.

What does RE-START do?

The battery can reserve enough energy for a restart after an over-discharge event. The reserve can be activated with the compatible wireless remote.

Can I use a standard lead-acid charger?

No. Use a charger approved for 12V LiFePO4 starter batteries and follow Antigravitys charging limits.

Does it work with every alternator?

No. Confirm that the vehicle charging system operates within the manufacturers approved lithium-battery voltage range.

Is this a deep-cycle battery?

No. It is designed primarily as a starter battery, not as a dedicated deep-cycle house battery.

Can I install it myself?

Installation is straightforward when the case size and terminals match, but electrical safety and secure mounting are essential. Professional installation is recommended when fitment is uncertain.

How should it be stored?

Disconnect parasitic loads, store it in a dry temperature-controlled location, and check charge condition according to the manufacturers instructions.

Installation Instructions

1. Turn the vehicle off and disconnect the negative cable before the positive cable.
2. Remove the original battery and confirm the tray, hold-down, polarity, and cable reach.
3. Secure the lithium battery so it cannot move or contact surrounding components.
4. Connect the positive cable first, then the negative cable, and verify tight clean connections.
5. Confirm normal charging voltage and test the RE-START remote according to the manufacturers instructions.

California Proposition 65: This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information, visit www.P65Warnings.ca.gov.