The Antigravity AT12BS RE-START Lithium Battery is an ultra-lightweight, high-performance lithium battery that can replace standard YT12-BS size lead-acid batteries.
Its most notable feature is the RE-START function, which automatically enters a protection mode when the battery begins to run low, reserving enough power to restart the engine. Simply press the button on the top of the battery to crank the engine and restart.
It features a full BMS (Battery Management System) to automatically control over-discharge, over-charge, temperature increases, and cell balancing. This significantly improves safety, stability, and lifespan compared to conventional lead-acid batteries.
It is extremely lightweight at approx. 1.04 kg, achieving up to a 70% weight reduction.
This also provides benefits for handling, braking, and acceleration performance.
Size
Approx. 15.0 × 7.0 × 13.0 cm (L × W × H)
Specifications
Starting Current: 360 Cranking Amps
Capacity: 12Ah (Lead-acid equivalent) / Actual capacity 6.1Ah / 78Wh
Weight: Approx. 1.04kg
Mounting: Can be mounted in any orientation (no leaks / LiFePO4 used)
Part Number: AG-AT12BS-RS
Compatible Battery Sizes
YT12-BS
YT12B / YT12B-BS
YT14-BS
YT14B-BS
Recommended Use
Street bikes up to 1200cc
Circuit use and sports riding
Custom or race vehicles prioritizing weight reduction
Suitable for a wide range of uses from daily riding to touring
Note
Not for use in four-wheeled vehicles.
For older regulators (pre-1990 models), we recommend checking the condition or replacing them as overvoltage may occur.
Please use a lithium-compatible charger for charging (do not use chargers for lead-acid batteries).
Before Ordering
〇 About Import Consumption Tax
At Shaftoya Shopping Site, we pay the import consumption tax incurred at the time of import on your behalf, so there will be no additional charges beyond the total paid at checkout.
〇 Compatibility Confirmation
Our entire product database is based on North American vehicles (USDM), so please verify compatibility with Japanese models (JDM) before ordering. (If you are unsure if a listed product fits your vehicle, please feel free to contact us. Our support team will be happy to assist you.)
If you order without confirming compatibility, we cannot accept returns due to non-compatibility.
Please note that even if items are sorted by selecting the year, manufacturer, and model using the tabs on our top page, it does not necessarily guarantee fitment on Japanese models without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us before ordering if you have any questions.
○ Regarding Shipping
Shipping costs are paid at the time of payment. Shipping estimates are calculated automatically at the checkout page when you enter your shipping address. For large items such as body parts, the actual shipping cost may occasionally differ significantly from the automated calculation. In such cases, we will contact you individually via email.
All products are generally shipped internationally from our US warehouse. Unlike domestic Japanese shipping, international shipping takes about 7 to 14 days, so please allow yourself plenty of time when ordering. If you are in a hurry, please contact us in advance to confirm delivery times. Note that all items are transported via air freight; they are not shipped via sea freight.
○ Regarding Japanese Vehicle Inspection (Shaken) Compliance
All products we handle are basically designed and manufactured outside of Japan. Please note that they are not compliant with the "Japanese Vehicle Inspection System," and we cannot provide documents such as strength calculation sheets for these inspections. Therefore, all parts are sold for the purpose of "use on circuits, private property, or off-road," and installation and use are at your own risk.
○ Regarding Warranty
Please check the contents immediately upon arrival. As all products are shipped internationally from outside Japan, there may be damage to packaging or products due to transit. We will handle returns, refunds, or exchanges for products with shipping damage, defects, or incorrect items only if notified within 7 days of receipt. Please understand that for products sold through us, we will provide warranty support "exclusively through us." We do not provide support through other companies or distributors located within Japan.