Antigravity Batteries AG-1201 Lithium Battery (Compact High-Power Model)
The Antigravity AG-1201 is a lithium battery designed for motorsports that delivers 360 cold cranking amps of starting power while maintaining an incredibly compact and lightweight form factor.
It is a direct replacement for standard 12Ah lead-acid batteries and can reduce vehicle weight by approximately 3–4 kg. It is the ideal model for race and custom vehicles that require high cranking performance while minimizing weight.
Specifications
Case Dimensions: Approx. 11.4 × 8.2 × 10.8 cm (L × W × H, including terminals)
Cranking Amps: 360 Cranking Amps
Capacity (Lead-Acid Equivalent): 16Ah equivalent
Actual Capacity (LiFePO4): 8Ah (102.4Wh)
Weight: Approx. 1.02 kg
Chemical Composition: LiFePO4
Terminals: Brass, Heavy-Duty
Included Accessories: Adhesive-backed foam spacers for fitment adjustment
Features
The ultra-compact "Small Case" design is perfect for vehicles with limited space or those prioritizing weight reduction.
With 360 cold cranking amps, it provides more powerful engine starts than a standard 12Ah lead-acid battery.
Weighing only about 1.02 kg, it helps improve acceleration, braking, and handling performance.
Includes cell-balancing technology for stable voltage; resistant to leaks, gas emissions, and high-vibration environments.
Easily fits into most battery trays using the included foam spacers.
Can be mounted in any orientation, making it suitable for custom and race vehicles.
Recommended Use & Engine Displacement
Daily Use:
Suitable for motorcycles up to 1100cc class.
If more robust starting power is required, the AG-1601 is recommended.
Race Use (Motorcycles):
Suitable for vehicles up to 1500cc class.
For high-compression or highly tuned engines, the AG-1601 is recommended.
4-Cylinder Race Cars:
Suitable for up to 1800cc class.
Important (Notes)
The Small Case series, including the AG-1201, does not feature a full BMS (overcharge/over-discharge protection).
Because it only includes cell balancing, there is a risk of performance degradation if the battery is over-discharged or if the vehicle has high parasitic electrical draw.
This model is intended primarily for closed-course (racing) use.
If used in a street-legal vehicle, the following conditions are recommended:
• Minimal parasitic electrical draw from the vehicle.
• A properly functioning regulator/charging system.
• Regular voltage checks.
Contents
Lithium battery unit
Foam spacer set
Terminal bolts for installation
Warranty
3-year warranty (subject to manufacturer terms)
Before Ordering
〇 Regarding Import Duties and Taxes
At Shaftoya Shopping, we cover the import consumption tax incurred during the import process on your behalf, so you will not be charged any additional fees beyond the total amount paid at checkout.
〇 Checking Compatibility
Our entire product database is based on North American vehicle specifications (USDM). Please confirm compatibility with Japanese domestic market (JDM) vehicles before ordering. (If you are unsure if the listed product fits your vehicle, please feel free to contact us. Our support team will be happy to look it up for you.)
If you order without verifying compatibility, we cannot accept returns due to incompatibility.
Furthermore, please note that even if a product appears sorted for your vehicle after selecting the year, make, and model using the tabs on our homepage, it does not necessarily guarantee a direct fit for Japanese market models without modification.
All product descriptions have been translated into Japanese using translation software. Due to potential ambiguities in terminology, please contact us if you have any questions before placing your order.
○ Shipping Information
Shipping costs are paid at checkout. Estimates for shipping can be calculated automatically by entering your address on the checkout page. For large items such as body parts, there may occasionally be a significant discrepancy between the automatically calculated shipping cost and 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 within Japan, international shipping typically takes 7 to 14 days, so please allow ample time for your order. If you are in a hurry, please contact us to verify delivery times before ordering. All products are shipped via air freight; they are never shipped via sea freight.
○ Regarding Japanese Vehicle Inspections (Shaken)
The products we carry are generally designed and manufactured outside of Japan. Please note that they are not compliant with "Japanese vehicle inspection standards," and we cannot provide structural integrity certificates or similar documentation for Japanese inspections. Therefore, all parts are sold for "circuit, private property, or off-road use only." Installation and use are at your own risk.
○ Warranty Information
Please inspect your items immediately upon arrival. As all products are shipped internationally, packing boxes and items may occasionally sustain damage during transit. For items that are damaged, defective, or incorrect, we will only accept returns, provide refunds, or offer replacements if contacted within 7 days of receipt. Please understand that for products sold through us, warranty claims must be processed "exclusively through us." We do not support warranty service handled through other companies or agents located within Japan.