Antigravity Batteries ATX12-HD-RS Lithium Battery (with RE-START Technology / Heavy Duty / Full BMS)
The Antigravity ATX12-HD-RS is a high-power, lightweight lithium battery that replaces standard YTX12 sized batteries.
This model is the Heavy Duty (high capacity, high cranking performance) version of the ATX12-RS, providing reliable starting power even for large-displacement vehicles.
With the built-in RE-START (emergency jump-start) feature, you can restart your engine simply by pressing a button on the top of the battery if it ever goes dead. It also includes a full BMS (over-discharge / over-charge / thermal / short-circuit / cell balancing protection) to enhance safety and lifespan.
Specifications
Case Size (YTX12 compatible): Approx. 15.0 × 8.6 × 13.2 cm (L × W × H)
Cranking Amps: 480 CCA
Capacity (Lead-acid equivalent): 16Ah
Actual Capacity (LiFePO4): 8Ah (102Wh)
Weight: Approx. 1.36kg (3 lbs)
Chemical Composition: LiFePO4
Management System: Full BMS included
RE-START function: Emergency restart via button on top of battery or optional remote
Terminals: 4-terminal design (flexible +/− positioning)
Mounting Orientation: Can be mounted in any orientation
Application: Motorcycle / Powersports (Not for automotive use)
Features
The RE-START (emergency jump-start) feature allows you to restart your engine in an emergency if the battery dies. The full BMS automatically manages over-charge, over-discharge, thermal protection, short-circuit protection, and cell balancing to improve battery life and safety.
With 480 cranking amps of high starting power and an equivalent capacity of 16Ah, it delivers stable starting performance even for large-displacement engines.
The weight is significantly reduced compared to standard lead-acid batteries, positively impacting the vehicle's acceleration, braking, and handling. The 4-terminal design simplifies cable routing and makes it easy to fit into various vehicle models.
Recommended Use
Daily use:
Ideal for motorcycles up to 1500cc class
Sports driving / Race vehicles:
Compatible with large-displacement and high-compression vehicles
Not for use in:
PWC (Personal Watercraft)
Any automotive applications
Compatible Battery Sizes
YTX12
YTX12-BS
YTX14 / YTX14-BS / YTX14H / YTX14H-BS / YTX14L / YTX14L-BS
YTX16-BS / YTX16-BS-1
YTX20CH / YTX20CH-BS
HYB16A-AB
GYZ16H / GYZ16HL
Important Notes
Models with the RE-START feature are not recommended for Harleys or other large-displacement, high-compression V-Twins (e.g., engines with camshaft modifications or high-compression pistons) with 103cid (approx. 1690cc) or greater displacement.
If your vehicle falls into this category, please use the following models:
YTX20 / YTX12-24 / YTX12-20 / V-10
Included Items
Lithium battery unit
Mounting terminal bolts
RE-START function manual
Warranty
3-year warranty (subject to manufacturer terms)
Before Ordering
〇 Regarding Import Consumption Tax
On the Shafto-Ya shopping site, we pay the import consumption tax incurred during customs clearance on your behalf, so you will not be charged any additional fees beyond the total amount paid at checkout.
〇 Compatibility Confirmation
Our entire product database is based on North American specification (USDM) vehicles. Please verify whether the product is compatible with your Japanese specification (JDM) vehicle before placing your order. (If you are unsure whether the listed product is compatible with your vehicle, please feel free to contact us. Our support team will be happy to look it up for you.)
If you order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if items are sorted by year, make, and model using the tabs on our homepage, it does not guarantee a direct fit on Japanese-spec vehicles without modification.
All products have been translated into Japanese using software. There may be confusing expressions, so please contact us before ordering if you have any questions.
○ Regarding Shipping
Shipping costs are paid at checkout. Shipping cost estimates are automatically calculated when you enter your shipping address on the checkout page. 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 via email individually.
All products are generally shipped internationally from our U.S. warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please order with enough time to spare. If you are in a hurry, please contact us to confirm the delivery date in advance. Please note that all products are transported by air; they are not shipped by sea freight.
○ Regarding Japanese Vehicle Inspection (Shaken) Compliance
Please note that all products handled by our company are designed and manufactured outside of Japan. They are not compliant with the "Japanese Vehicle Inspection System," and we are unable to provide strength calculation documents for Japanese inspection purposes. Therefore, all parts are sold for the purpose of "circuit, private property, or off-road use only," and installation and use are at your own risk.
○ Regarding Warranty
Please check the contents of your order as soon as it arrives. Because all products are shipped internationally from outside Japan, there may be cases of shipping damage to packaging or products. We will only provide returns, refunds, or replacement products for items with shipping damage, defects, or incorrect items if you contact us within 7 days of receipt. Please understand that for products sold through our company, all warranty-related support will be handled "exclusively through us." We do not coordinate with other companies or agencies located within Japan.