12V Car Battery 660CCA 100RC LiFePO4 Start and Stop Batteries, 40Ah Lithium

The NebuQuic 12V 40Ah LiFePO4 Battery provides 512Wh of energy alongside 660 cold cranking amps (660CCA) for start-and-stop vehicle functions and deep cycle needs. Weighing 14.8 pounds in a compact casing, it suits buyers looking to power cars, SUVs, boats, trolling motors, lawn mowers, or off-grid setups without the heavy bulk of traditional lead-acid units.

This battery is designed for long service life, supporting over 6,000 deep charge and discharge cycles with maintenance-free upkeep. An integrated 400A smart Battery Management System constantly protects against common electrical faults, including overcharging, deep discharge, overcurrent, overheating, and short circuits. It also includes an IP66 waterproof rating and threaded terminals with M8 screws to simplify installation in damp outdoor conditions.

Cold weather management is handled automatically. The Grade A cells operate between -20°C (-4°F) and 60°C (140°F), and if the temperature drops below 0°C (32°F), an automatic heating system warms the battery up to 5°C (41°F) prior to accepting a charge. For system expansion, you can wire up to 16 batteries in a 4P4S configuration to create a 48V 160Ah power bank.

There are a few setup constraints to keep in mind. The unit ships with a charge level below 80 percent and must be fully topped off using a dedicated lithium battery charger prior to its first use, as direct use causes voltage instability. Additionally, discharge automatically shuts off when the state of charge hits 25 percent, requiring a manual press of the white restart button to force emergency operation.

Verdict: The NebuQuic 12V 40Ah battery is a reliable choice for anyone needing lightweight starting power and durable deep cycling across a broad range of vehicles and equipment. It is particularly well suited for users operating in freezing temperatures who want built-in thermal protection.

• Battery Type: Grade A LiFePO4 (Lithium Iron Phosphate)
• Voltage & Capacity: 12V, 40Ah (512Wh)
• Cold Cranking Amps: 660CCA (100RC)
• Dimensions: 9.5 x 6.9 x 8 inches
• Weight: 14.8 lbs
• BMS Rating: 400A
• Cycle Life: 6,000+ deep cycles
• Waterproof Rating: IP66
• Operating Temperature: -20°C (-4°F) to 60°C (140°F)
• Maximum Configuration: Up to 16 batteries (4P4S, 48V 160Ah)
• Terminal Type: Threaded with M8 screws

A great fit if you:

• Need a lightweight 12V battery for a car, SUV, camper, wheelchair, or lawn mower.
• Operate equipment in freezing conditions and need automatic low-temperature pre-heating.
• Want to build a larger 48V 160Ah power system using up to 16 connected units.
• Run marine equipment like trolling motors or sump pumps that require IP66 water resistance.

Consider something else if you:

• Need a battery that is 100 percent plug-and-play straight out of the box without initial charging.
• Do not have access to a dedicated lithium battery charger.

Can I use this battery immediately out of the box?
No. To ensure safe transit, it ships with less than an 80 percent charge and must be fully charged with a lithium battery charger before its first use to avoid voltage issues.

How does the battery handle freezing temperatures?
The battery operates down to -4°F (-20°C) and features built-in heating that warms the unit to 41°F (5°C) before charging if temperatures drop below 32°F (0°C).

What should I do if the battery stops discharging at 25 percent capacity?
The system turns off discharge at 25 percent state of charge for safety, but you can press the white button on the unit to force an emergency restart.

How many of these batteries can be linked together?
You can connect up to 16 batteries in a 4P4S setup to achieve a 48V 160Ah configuration.