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INR21700JP40 Cylindrical Cells 3.7V 4000mAh 45A Discharge Lithium Ion Battery 21700 Battery for Electric Vehicle

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INR21700JP40 Cylindrical Cells 3.7V 4000mAh 45A Discharge Lithium Ion Battery 21700 Battery for Electric Vehicle

Brand Name:	Ampace
Model Number:	21700A (JP40)
MOQ:	130
Price:	$1.89
Packaging Details:	130pcs/Carton box
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

China

Certification:

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

Document:

JP40(21700A) specification.pdf

Supply Ability:

500K/Month

Highlight:

21700 4000mAh lithium ion battery

45A discharge 21700 battery

3.7V 21700 battery for electric vehicle

Product Description

INR21700JP40 Cylindrical Cells 3.7V 4000mAh 45A Discharge Lithium Ion Battery 21700 Battery for Electric Vehicle

The Ampace JP40 21700 lithium-ion battery cell delivers 4000mAh capacity and up to 40A continuous discharge, providing reliable power output and high-rate performance for demanding applications.

Cell Characteristics

Specification	Value
Capacity	Typical 4000mAh (14.8Wh) Minimum 3900mAh (14.43Wh)
Cell Voltage	Nominal 3.7V Charge 4.2V Discharge 2.5V
Continuous Charge Current	Standard 2A Maximum 8A
Continuous Discharge Current	Maximum 45A
Ambient Temperature	Charge -10～60℃ Discharge -30～75℃
Impedance	≤4mΩ
Weight	70g
Dimension	70.42mm(Max) * 21.31mm(Max)
Cycle life	400cycle(60%)

Key Features

High Capacity: 4000mAh provides extended runtime before requiring recharge
High Discharge Rate: 45A continuous discharge, ideal for medium-to-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

Flashlights: Ideal for high-lumen LED torches requiring consistent power
Medical Devices: Reliable power source for essential equipment
Power Banks & Backup Systems: Supports portable energy solutions
Lightweight Power Equipment: Auxiliary power for robotic vacuums, electric bicycles, scooters, and fishing boats
Power Tools: High burst power for drills, angle grinders, electric saws, and other high-current tools

Safety 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 400 cycles before noticeable capacity reduction - recycle at end of life
Do not crush, incinerate, or modify batteries
Only use within manufacturer specifications

Ratings & Review

Overall Rating

5.0

Based on 50 reviews for this product

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

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Modeste

Ireland Sep 28.2026

trustpilot.com

Helpful (2648)

They look great and are very practical to use. The quality is impressive, and they’re a great choice for my projects. Overall, a lovely product that does exactly what I need. Very happy with my purchase!

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products details

18650 Cylindrical Cells

21700 Cylindrical Cells

Full Tab Cylindrical Cells

LiFePO4 Prismatic Cells

12.8V LiFepo4 Battery

25.6V LiFepo4 Battery

Home Energy Storage Batteries

LiFePO4 Cylindrical Cells

Semi Solid State Power Bank

INR21700JP40 Cylindrical Cells 3.7V 4000mAh 45A Discharge Lithium Ion Battery 21700 Battery for Electric Vehicle

21700 4000mAh lithium ion battery

45A discharge 21700 battery

3.7V 21700 battery for electric vehicle

Overall Rating

Rating Snapshot

All Reviews

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