Antigravity Group-51R Lithium Car Battery

The Antigravity Group-51R Lithium Car Battery is a game-changer for both performance enthusiasts and everyday drivers. Designed as a direct OEM replacement, it delivers massive cranking power in a lightweight package, all while featuring built-in wireless jump-starting to ensure you’re never stranded again.

Lightweight, Powerful, and Smart

This innovative lithium battery combines cutting-edge RE-START technology with a complete Battery Management System for unmatched reliability and performance. Whether installed in a Honda Civic, S2000, Miata MX-5, or Nissan GTR, the Group-51R battery provides exceptional starting power, extended life, and substantial weight savings compared to traditional lead-acid batteries.

Features

• Group 51R OEM automotive case size (direct drop-in replacement)
• Dimensions: 9.4 x 5.2 x 8.6 in (238 x 130 x 220 mm)
• Available in 24 Ah (Race Use Only) and 30 Ah capacities
• High cranking power: 1000 CA (24 Ah), 1200 CA (30 Ah)
• Wireless RE-START technology: activate jump-starting from the included keyfob
• Built-in Battery Management System with over-discharge, over-charge, short circuit, thermal protections, and cell balancing
• Ultra lightweight: 70% lighter than lead-acid, with weight savings of up to 40 lbs
• Lifepo4 lithium chemistry for safety and durability
• Threaded terminals: M8x1.25 Group-51R

Key Benefits

RE-START Technology: If the battery is ever discharged, the intelligent BMS will preserve just enough energy to restart your vehicle. Simply press the keyfob button, start the car, and drive away—no jump pack or roadside help needed.
Full Battery Management: Advanced BMS provides safety circuitry, over/under voltage protection, and cell balancing for a longer life cycle—up to 7–9 years depending on usage and climate.
Exact OEM Fitment: Available in standard BCI sizes to fit most performance and passenger cars without modification.
Performance Gains: Weight savings of 25–55 lbs improves handling, braking, and acceleration. High cranking power easily turns over engines up to 900 horsepower.
Environmentally Safer: No lead, acid, or heavy metals—fully recyclable and safer for your vehicle and the environment.

Specifications

• Weight: 8.5 lbs (24 Ah), 11.25 lbs (30 Ah)
• Size: 9.4 x 5.2 x 8.6 in
• Amp Hours: 24 Ah (Race Use Only), 30 Ah
• Cranking Amps: 1000 CA / 1200 CA
• Nominal Voltage: 12.8 V
• Low Voltage Cut-Off: Yes
• Positive Terminal: Right Side

FAQs: Antigravity Group-51R Lithium Car Battery

How does the wireless RE-START function work? If the battery is discharged, the BMS puts it into sleep mode to reserve power. Pressing the keyfob button reactivates the battery so you can start your vehicle without opening the hood.

Is this battery a direct replacement for OEM Group-51R batteries? Yes, it’s designed to fit OEM Group-51R dimensions exactly, making it a simple drop-in installation for most vehicles.

Can this battery be used in daily driven vehicles? Absolutely. While the 24 Ah version is race-only, the 30 Ah model is ideal for street and performance applications, offering excellent reliability and long life.

What vehicles commonly use Group-51R batteries? Common applications include Honda Civics, Honda S2000, Miata MX-5, and Nissan GTR, among many others.

NEW! Lightweight Lithium Batteries with Wireless Remote Built-In Jump Starting!

Antigravity Batteries has changed the game again with their latest Lithium-ion Car Batteries. The newest RE-START line of batteries offers built-in WIRELESS Jump-Starting! That means if your battery is ever discharged, simply press the button on the provided key fob, start the car, and drive away! No need for a jump starter or roadside assistance. You don’t even have to open the hood—activate it from inside your vehicle!

If you want to track your battery status via Bluetooth, you can use the Bluetooth Battery Tracker PLUS (sold separately).