The Antigravity Group-27 RE-START Lithium Car Battery is a lithium battery designed to replace a standard Group 27 battery.
It features our proprietary RE-START (wireless built-in jump-starting) technology, which allows you to restart the vehicle if the battery dies simply by pressing a button on the included remote. No jump starter or roadside assistance required.
It has a high-performance full BMS (Battery Management System) built-in to protect both the battery and the vehicle from over-discharge, over-charge, temperature anomalies, and short circuits.
Furthermore, it is up to 70% lighter than a lead-acid battery, offering significant benefits for handling, acceleration, and fuel economy.
Dimensions
Approx. 30.5 × 17.4 × 22.2 cm (L × W × H)
Terminal Bolt Size: M8×1.25
Capacity / Cranking Performance (Selectable)
40Ah Model (AG-27-40-RS)
Cranking Amps: 1500 CA
Weight: approx. 6.8kg
60Ah Model (AG-27-60-RS)
Cranking Amps: 1800 CA
Weight: approx. 9.0kg
Features
Equipped with wireless jump-starting capability
Restart from inside the vehicle with the key fob remote
High-performance BMS maximizes battery life
Uses LiFePO4 cells for superior safety and vibration resistance
Direct bolt-on replacement, same size as original battery, no modifications needed
Up to 11–25kg lighter than lead-acid batteries
Low self-discharge, ideal for long-term storage
Compatible Vehicles / Applications
Vehicles using Group-27 size batteries
American cars / Trucks / SUVs
Honda and select GM vehicles
Marine/Boat battery replacement
Track cars / Performance vehicles / Race cars
Recommended Users
Those wanting to improve performance through weight reduction
Those who want to eliminate the risk of a dead battery
Vehicles with high-output engines or many electrical accessories
Street-to-track vehicles
Charging
Please ensure you use a charger compatible with lithium batteries.
Before You Order
〇 About Import Consumption Tax
At Shaftoya, we cover the import consumption tax incurred at the time of import, so there are no additional costs beyond the total amount paid at checkout.
〇 Checking Compatibility
Our entire product database is based on North American market (USDM) vehicles. Please verify if the item is compatible with your Japanese market (JDM) vehicle before ordering. (Feel free to contact us if you are unsure if a product fits your vehicle; our support team will be happy to investigate.)
If an order is placed without verifying compatibility, we cannot accept returns due to fitment issues.
Please note that even if our website's search filters show products after you select your year, make, and model, it does not guarantee a direct fit for Japanese-spec vehicles without modification.
All product information has been translated into Japanese using translation software. Due to the potential for confusing terminology, please contact us with any questions before placing your order.
○ Regarding Delivery
Shipping costs are paid at the time of checkout. Shipping estimates are calculated automatically at checkout when you enter your shipping address. For large items such as body parts, the automatically calculated shipping cost may occasionally differ significantly from the actual cost. In such cases, we will contact you individually via email.
In principle, all products are shipped internationally from our warehouse in the U.S. Unlike domestic shipping within Japan, international shipping typically takes 7 to 14 days, so please allow sufficient time for your order to arrive. If you are in a hurry, please contact us in advance to confirm delivery times. Note that all products are transported by air freight; we do not use sea freight.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
All products we handle are designed and manufactured outside of Japan. Please be aware that they are not compliant with the "Japanese Vehicle Inspection (Shaken) System," and we cannot provide strength calculation documents or similar paperwork for these systems. Consequently, all parts are sold for the purpose of use on tracks, private property, or off-road, and any installation or use is at your own risk.
○ Regarding Warranty
Please inspect your items immediately upon arrival. As all products are shipped internationally, shipping damage to packaging or the products themselves may occur. Returns, refunds, or exchanges will only be processed if you contact us within 7 days of receipt for damaged items, defective goods, or incorrect orders. Please understand that for any product sold through us, warranty-related support will be handled "exclusively through us." We do not provide support through other companies or distributors located within Japan.