Antigravity AG-401 Small Case 4-Cell Lithium Battery - Ultra Lightweight

Achieve extreme weight savings with the Antigravity AG-401 - the smallest and lightest battery in the Antigravity lineup. At just 1.1 lbs and measuring only 3.5" x 2.37" x 3.75", this ultra-compact 4-cell lithium battery is the most compact lightweight motorsport battery available. Perfect for race applications, lightweight builds, and performance vehicles where every ounce counts and space is at a premium.

Key Features:

• Ultra lightweight - only 1.1 lbs (vs. 6-10 lbs for lead-acid)
• Ultra-compact size: 3.5" x 2.37" x 3.75" (LxWxH to top of terminals)
• 4-cell lithium iron phosphate (LiFePO4) construction
• Smallest battery in Antigravity lineup
• Extreme cranking power in minimal size
• Built-in Battery Management System (BMS) for safety and longevity
• Holds charge for up to 1 year in storage
• No sulfation or memory effect
• Environmentally friendly - no heavy metals
• Made in the USA with Antigravity's legendary quality

Performance Benefits:

• Extreme Weight Savings: Save 5-9+ lbs over lead-acid batteries
• Maximum Space Savings: Smallest motorsport battery available
• Improved Performance: Lighter weight improves acceleration, handling, and lap times
• Race-Ready: Designed for race applications where weight and space are critical
• Reliable Starting: Strong cranking power despite ultra-compact size
• Long Service Life: 2-3x longer lifespan than lead-acid batteries

Specifications:

• Brand: Antigravity Batteries
• Part Number: ANTAG-401 (AG-401)
• Model: AG-401 Small Case
• Chemistry: Lithium Iron Phosphate (LiFePO4)
• Cells: 4-cell configuration
• Voltage: 12V
• Weight: 1.1 lbs (0.5 kg)
• Dimensions: 3.5" x 2.37" x 3.75" (L x W x H to top of terminals)
• Cranking Amps (CA): 150 CA
• Pulse Cranking Amps (PCA): 210 PCA
• Amp Hours (Ah): 4 Ah (Pb Eq)
• Made in: USA
• Barcode: 639713372694

Fitment Information:

• Recommended Applications:
• Race motorcycles (minimal electrical loads)
• Lightweight race cars and track cars
• Shifter karts and racing karts
• Small displacement race bikes (250cc-600cc)
• Custom builds where extreme weight savings is critical
• Applications with minimal electrical accessories
• Note: This is the smallest battery in the Antigravity lineup. Only suitable for applications with minimal electrical loads. Verify battery dimensions fit your battery box before ordering.

What's Included:

• Antigravity AG-401 lithium battery
• Terminal hardware
• User manual with installation and maintenance instructions

Installation Notes:

• Verify battery dimensions fit your battery box
• Use foam padding or battery tray to secure battery if needed
• Connect positive (red) terminal first, then negative (black)
• Ensure charging system voltage is 13.6-14.6V (standard charging system)
• Do not use with charging systems over 15V
• Use Antigravity lithium-compatible charger for maintenance charging
• IMPORTANT: Only suitable for applications with minimal electrical loads

Why Lithium Iron Phosphate (LiFePO4)?

Antigravity uses lithium iron phosphate (LiFePO4) chemistry, which is the safest and most stable lithium battery technology available. LiFePO4 batteries are inherently safer than other lithium chemistries, with superior thermal stability and no risk of thermal runaway. They also deliver consistent voltage throughout discharge, excellent cold-weather performance, and exceptional cycle life.

Built-In Battery Management System (BMS):

Every Antigravity battery includes an advanced Battery Management System that protects against overcharge, over-discharge, short circuit, and thermal issues. The BMS ensures safe operation and maximizes battery lifespan by preventing conditions that could damage the cells.

Extreme Weight Savings = Maximum Performance:

The AG-401 weighs only 1.1 lbs compared to 6-10 lbs for a comparable lead-acid battery. This extreme weight reduction of 5-9+ lbs is critical for race applications where every ounce counts. For racers, this weight savings translates directly to faster lap times, improved acceleration, and better handling.

Smallest Battery Available:

The AG-401 is the smallest battery in the Antigravity lineup and the most compact lightweight motorsport battery available anywhere. Its ultra-compact dimensions make it perfect for tight spaces, custom builds, and applications where a standard battery simply won't fit.

Race Applications Only:

IMPORTANT: The AG-401 is designed specifically for race applications with minimal electrical loads. It is NOT recommended for street use or vehicles with high electrical demands (lights, heated grips, GPS, audio systems, etc.). This battery is ideal for race bikes, track cars, and karts where electrical accessories are minimal or non-existent.

Charging & Maintenance:

Lithium batteries require different charging than lead-acid batteries. Always use a lithium-compatible charger (Antigravity SC-1, SC-4, or equivalent). The AG-401 holds its charge for up to 1 year in storage, making it perfect for race bikes that sit between events. No sulfation or memory effect means the battery maintains full capacity even after extended storage.

Why Antigravity?

Antigravity Batteries is the industry leader in lightweight lithium battery technology for automotive, motorcycle, and powersport applications. Their batteries are used by professional race teams, championship-winning riders, and serious enthusiasts worldwide. Every Antigravity battery is designed and manufactured in the USA to the highest quality standards.

Important Notes:

• Verify battery dimensions fit your battery box before ordering
• Use lithium-compatible charger only (Antigravity SC-1, SC-4, or equivalent)
• Only suitable for race applications with minimal electrical loads
• NOT recommended for street use or high electrical demand applications
• Charging system voltage must be 13.6-14.6V (standard spec)
• Terminal covers recommended to prevent accidental shorts

Perfect For: Race motorcycles, lightweight race cars, shifter karts, small displacement race bikes, or any application where extreme weight savings and compact size are critical and electrical loads are minimal.

Pro Tip: Pair with Antigravity terminal covers and a lithium-compatible charger for complete battery protection and maintenance.

Race-Proven: The AG-401 is trusted by professional race teams and championship-winning riders for its extreme weight savings and reliable performance in race applications.

Achieve extreme weight savings with Antigravity's AG-401 lithium battery - only 1.1 lbs, the smallest motorsport battery available, made in the USA.