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BAK 40D 4100mAh 3.6v Lithium Ion Battery Pack 12A Charge 21700 Li-Ion Full Tab Cylindrical Cells

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BAK 40D 4100mAh 3.6v Lithium Ion Battery Pack 12A Charge 21700 Li-Ion Full Tab Cylindrical Cells

Brand Name:	BAK
Model Number:	40D
MOQ:	1
Price:	＄2.34
Packaging Details:	130pcs/Carton box
Payment Terms:	T/T

Detail Information

Product Description

Detail Information

Place of Origin:

China

Certification:

UN38.3/CE/UL/IEC62133/KC/BIS

Document:

INR2170-40D specification.pdf

Low Temperature Performance:

Charge: 0～45℃ Discharge: -20～60℃

Low Impedance:

Max 5MΩ

High Discharge Rate:

Max 45A

Terminal Type:

Full Tab

Cell Type:

Cylindrical

Applications:

Electric Tools, Gardening Tools, Cleaning Appliances, Drones

Key Feature:

Ultra-low Internal Resistance, High Rate Capability, Low Temperature Rise

Supply Ability:

500K/Month

Highlight:

4100mAh 3.6v lithium ion battery pack

4100mAh 3.6v 21700 Li-Ion battery

12A Full Tab Cylindrical Cells

Product Description

BAK 40D 3.6v 4100mAh 12A Charge Low Temperature Rise 21700 Li-ion Full Tab Cell

The 40D Battery is a high-performance lithium-ion rechargeable power cell designed for long-lasting energy delivery and reliable performance. With a 4100mAh capacity and 45A maximum continuous discharge rate, this battery is ideal for high-demand applications, offering stable output and extended usage time.

Cell Characteristics

Specification	Value
Capacity	Typical 4100mAh (14.76Wh) Minimum 4000mAh (14.4Wh)
Cell Voltage	Nominal 3.6V Charge 4.2V Discharge 2.5V
Continuous Charge Current	Standard 2A Maximum 12A
Continuous Discharge Current	Standard 800mA Maximum 45A
Ambient Temperature	Charge 0～45℃ Discharge -20～60℃
Impedance	≤5mΩ
Weight	≤68g
Dimension	70.75mm(Max) * 21.45mm(Max)
Cycle life	600cycle(60%)

Key Features

Extremely Low Internal Impedance: The full tab structure minimizes the current collection path, significantly reducing internal resistance compared to conventional cells
Excellent Thermal Management: The uniform current distribution results in low and even heat generation
High Discharge Rate: 45A continuous discharge, ideal for high-drain applications
Lithium-Ion Chemistry: Provides stability, efficiency, and low internal resistance
Rechargeable & Long-Lasting: Supports multiple charge cycles with minimal degradation
Output Stability: Stable voltage curve during discharge ensures continuous power output
Compact 21700 Size: Universally compatible with a wide range of electronic devices

Applications

Aerospace: Provides lightweight, high-energy-density batteries for spacecraft, drones, UAV, and model aircraft
Robotics: Supplies continuous power for high-load robots
Lightweight Power Equipment: Assists with power for electric motorcycles, snowmobiles, electric bicycles, and other lightweight power tools
Power Tools: Delivers high burst power for drills, angle grinders, electric saws, blow dryers, and other high-current tools
Cleaning Appliances: Provides stable and lasting power for vacuum cleaners, mite removers, floor washers, steam mops, garden tools, and more, ensuring work efficiency and long battery life.
Medical Electronics: Provides highly reliable power for life monitors, portable medical devices, and more

Warning

Lithium-ion batteries require proper handling and knowledge to ensure safe operation
Failure to follow safety guidelines may result in fire, explosion, serious injury, or property damage
Only purchase and use if you fully understand lithium-ion battery safety
Never leave a battery unattended while charging
Keep away from animals and children
Prevent contact with metal objects (keys, coins, tools) to avoid short circuits
Inspect wraps and insulators regularly for damage - repair or dispose of damaged batteries immediately
Resellers must pass these warnings to customers
Typical cycle life of 200-500 cycles before noticeable capacity reduction - recycle at end of life
Do not crush, incinerate, or modify batteries
Only use within manufacturer specifications

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