12V 40Ah 36Ah Lithium Car Starting Battery CCA 400A

Our 12V 40Ah/36Ah Lithium Iron Phosphate (LiFePO4) Car Starting Battery delivers exceptional power and reliability for automotive applications. As a leading lithium battery manufacturer, we specialize in OEM/ODM solutions, offering customizable, high-performance energy systems that meet rigorous industry standards.

Key Features

High-Capacity Energy Output: With a 12.8V voltage and 40Ah/36Ah capacity, this battery ensures robust power for engine starts and accessory operation.
Extreme Weather Reliability: A Cold Cranking Amp (CCA) rating of ¡Ý400A guarantees dependable starts even at -30¡ãC.
Long-Term Durability: Over 4,000 cycles at 80% Depth of Discharge (DoD) provide 3x the lifespan of traditional lead-acid batteries.
Compact and Lightweight: Weighing only 5 kg with dimensions of 260x175x200mm, it reduces vehicle load while enabling flexible installation.
Low Self-Discharge: Maintains 98% charge monthly, ensuring readiness during prolonged storage.

Product Description

Engineered with advanced LiFePO4 chemistry, our 12V 40Ah/36Ah Lithium Starter Battery combines safety and efficiency. The military-grade ABS casing with IP65 protection resists dust, water, and vibrations, making it ideal for harsh environments. Integrated Battery Management System (BMS) prevents overcharge, overheating, and short circuits, enhancing operational safety.

Rapid Charge/Discharge: Supports 80A continuous charging and 150A peak discharge currents for high-demand scenarios.
Eco-Friendly Design: Non-toxic LiFePO4 materials align with global sustainability initiatives while reducing disposal costs.
Customization Options: OEM/ODM clients can tailor terminal types, branding, and smart features like Bluetooth-enabled SOC monitoring.

Why Choose 12V 40Ah Lithium Car Starting Batteries with 400A CCA?

12V 40Ah lithium car starting batteries provide reliable 400 cold cranking amps (CCA) for consistent engine starts, featuring lightweight design, long cycle life, and advanced safety systems. Their smart Battery Management System (BMS) ensures optimal performance and protection, making them a superior alternative to traditional lead-acid batteries for automotive and deep cycle applications.

What are the key technical specifications of 12V 40Ah lithium car starting batteries?

These batteries have a nominal voltage of 12.8V and a capacity of 40Ah, delivering 400A cold cranking amps. They weigh approximately 5.5 kg and measure about 197 x 128 x 220 mm. The battery uses LiFePO4 prismatic cells with a max continuous discharge current of 80A and peak discharge current of 500A for short bursts. The battery supports charging voltages up to 14.4V and operates within –20°C to 65°C discharge temperature range.

How does the 12V 40Ah lithium battery deliver 400A cold cranking amps (CCA)?

The battery’s LiFePO4 cells provide high current bursts necessary for engine starting, with an integrated BMS managing current flow and thermal conditions to safely deliver up to 400A CCA. This ensures reliable starts even in cold conditions, outperforming many lead-acid batteries in power density and efficiency.

What safety features do 12V 40Ah lithium car batteries include?

Equipped with a smart BMS, these batteries protect against overcharge, over-discharge, short circuit, overcurrent, and temperature extremes. Certifications include UL1642, IEC62133, CE, RoHS, and UN38.3, ensuring compliance with international safety standards. The sealed design eliminates acid leaks and reduces fire risk.

How long is the cycle life and lifespan of 12V 40Ah lithium batteries?

These batteries provide more than 3000 charge-discharge cycles at 80% depth of discharge, translating to 7 to 10 years of service life, significantly longer than typical lead-acid batteries which last 500 to 800 cycles.

How are 12V 40Ah lithium car batteries charged and maintained?

They support fast charging with recommended currents between 2A and 20A, reaching full charge in about 2.5 hours. Maintenance-free operation requires no watering or equalizing. Optimal charging temperature is 0°C to 45°C, with discharge effective from –20°C to 65°C. Proper storage and periodic inspection enhance battery longevity.

What applications are suitable for 12V 40Ah lithium car batteries?

Ideal for automotive engine starting, marine applications, recreational vehicles, trolling motors, backup power, and portable electronics, these batteries offer versatile, reliable power for various demanding uses.

How does the battery management system (BMS) enhance performance and safety?

The BMS continuously monitors voltage, current, temperature, and state of charge, balancing cells to prevent damage from overcharge or deep discharge. It protects against short circuits and thermal runaway, and provides real-time data for predictive maintenance, maximizing battery life and safety.

How does the lightweight design of 12V 40Ah lithium batteries benefit vehicles?

Weighing about one-third of comparable lead-acid batteries, these lithium batteries reduce vehicle weight, improving fuel efficiency, acceleration, and handling. Their compact size also allows easier installation and handling.

What environmental advantages do 12V 40Ah lithium batteries provide?

Lithium batteries eliminate toxic lead and acid, reducing hazardous waste and pollution. Their long lifespan decreases battery turnover and waste. Additionally, lithium batteries are recyclable, supporting sustainable practices and reducing environmental impact.

How does temperature affect the performance and durability of 12V 40Ah lithium batteries?

Optimal operation occurs between –20°C and 65°C for discharge and 0°C to 45°C for charging. Charging below freezing is disabled to protect battery health. Extreme temperatures can temporarily reduce capacity and accelerate aging, but integrated thermal management and BMS protections mitigate these effects.

Chart: 12V 40Ah Lithium Battery vs Lead-Acid Battery Comparison

Chart: Battery Cycle Life vs Depth of Discharge (DoD)