3.6V 4000mAh 21700 40P NCM cylindrical Battery Cell

21700 40P cylindrical NCM cell 3.6V 4000mAh full-rate battery power tools/gardening tools

4000
Nominal Capacity(mAh)

3.6
Nominal voltage(V)

300
Nominal Cycles(times)

70Max
MaxWeight (g)

205
Energy Density(Wh/kg)

≤12
AC internal resistance (mΩ)

Application

Vacuum cleaners, drills, lawn mowers, power tools, garden tools

Product Certification

MOQ: 1 PCS

Fast Quotation

Low self-discharge rate

High Security

Low internal resistance

High capacity

High Discharge Rate

Long Cycle Life

High Energy Density

Fast charging

Energy Storage Battery Catalog

Modlel

Capacity(mAh)

Nominal Voltage(V)

Working Voltage(V)

Standard Cycle(25℃)

Maximum Charge/Discharge current(A)

Energy Density(Wh/kg)

Weight(g)

Size(mm)

Types

18650/20P

2000 

3.60 

2.5~4.2

300 

4.0/30

160 

45Max

18.35×65.00

NCM

18650/25P

2500 

3.60 

2.5~4.2

300 

6.0/30

187 

48Max

18.35×65.00

NCM

18650/30P

3000 

3.60 

2.5~4.2

250 

4.0/30

225 

48Max

18.35×65.00

NCM

21700/40P

4000 

3.60 

2.5~4.2

300 

6.0/50

205 

70Max

21.15×70.15

NCM

21700/40PL

4000 

3.60 

2.5~4.2

400 

8.0/70

215 

67Max

21.15×70.15

NCM

18650/26V

2550 

3.60 

2.5~4.2

1000 

2.5/7.5

195 

47Max

18.35×65.00

NCM

18650/29V

2850 

3.60 

2.5~4.2

1000 

2.8/8.4

220 

46.5Max

18.35×65.00

NCM

18650/33V

3200 

3.60 

2.5~4.2

1000 

3.1/10.0

240 

48Max

18.35×65.00

NCM

18650/35V

3500 

3.65 

2.5~4.2

800 

3.4/10.2

255 

50Max

18.35×65.00

NCM

21700/50E

5000 

3.65 

2.5~4.2

1000 

10.0/15.0

257 

71Max

21.15×70.15

NCM

C33

15000 

3.20 

2.0~3.65

2500 

15/30

179 

267±6

33.3×140.8

LFP

C40

20000 

3.20 

2.0~3.65

4000 

20/60

174 

366±6

40.50×135.0

LFP

Product Specification

Model

21700/40P

Nominal Voltage

3.6V

Nominal capacity

4000mAh

Application scenario

Power tools, garden tools, electric two-wheelers, vacuum cleaners, sweeping robots

Standard charge

2.0A constant current charge to 4.20±0.05V,constant voltage charge cutoff current 100mA

Fast charging

6A constant current charge to 4.20±0.05V,constant voltage charge cutoff current 100mA

Standard discharge

6A constant current charge to 4.20±0.05V,constant voltage charge cutoff current 100mA

Charge/discharge voltage range

4.20V~2.50V

Battery weight

70g

Battery Size

Height: 70.15±0.15mm, Diameter: 21.15±0.10mm

AC internal resistance

≤12mΩ

Maximum continuous charging/discharging current

6.0/50A

Product Details

21700/40P 4Ah 3.6V
High Capacity, High Discharge rate

High Discharge rate
Supports up to 50A continuous discharge

Fast charging
Supports up to 6A charging

Wide temperature
Operable from -20°C to 60°C


High-energy density
Up to 205 Wh/kg

Packaging/Shipping Safety
Carton packing: 130 pcs/carton丨Wooden case packing:90pcs carton(11700pcs cells inside)

Product customization (Minimum order quantity ≥ 5,000 units)

For battery series/parallel assembly or wire leads, terminals, or tabs, contact us

Packaging Display

21700 Battery Cells-130 PCS Pack Display

Product Appliaction

Faithbat provides a variety of lithium batteries and accessories, which can be used in RVs, small boats, electric bicycles and industrial equipment. When choosing the right battery, you must consider compatibility and safety. Make sure the battery is compatible with your device and has built-in safety features, such as overcharge protection, over-discharge protection and thermal management system. The second, Determine battery parameters, including voltage, capacity, size and weight, charge-discharge rate, and cycle life. To ensure you get the most cost-effective battery under limited space conditions, you can consult our battery experts. You only need to provide the battery size and output power, and we can provide you with specific product models or customized solutions.

Quick consultation.

Warranty Policy

We stand behind our Grade A claims and know you will be more than satisfied with the product you receive. We offer a 30 Day no hassle, MONEYBACK GUARANTEE if you are unsatisfied with your cells for ANY reason. You will be responsible for the return shipping fees unless product is determined to be faulty.

We offer a 1 year warranty on all battery cell. We offer technical support and troubleshooting throughout the duration of the warranty. We can offer greater than a 1 year warranty on the cells but you will need to contact us with your design specs for approval. Large orders of 1,000pcs+ minimum.

Warranties only apply to original owner and are non-transferrable. We will verify your purchase prior to processing any warranty claims or returns.

If it is determined that our product is obviously faulty, we will ship new product to you immediately. We will cover the cost of return shipping.  This does not apply to items that have been damaged due to gross negligence, normal wear & tear, improper installation or abuse.

Our warranty does not cover items that have been damaged due to gross negligence, improper installation or abuse. If you are unsure, you should contact us before installing the product.

FAQ

The 37101 LiFePO4 battery cell is suitable for energy storage systems, electric vehicles (such as electric forklifts, electric trucks), high-power UPS equipment, and solar energy storage systems. Its large capacity and long life characteristics make it an ideal choice for scenarios with high energy density requirements.

  • Nominal voltage: 3.2V
  • Capacity: 60Ah
  • Size: standard size, suitable for large-capacity assembly
  • Discharge rate: supports 3C continuous discharge, instantaneous discharge can reach 5C
  • Cycle life: more than 3000 charge and discharge cycles
  • Operating temperature range: -20°C to 60°C

Depending on the application requirements, the battery pack can be assembled in the following ways:

  • Series connection: Increase the total voltage, for example, 16 strings can form a 51.2V system for energy storage applications
  • Parallel connection: Increase the total capacity, for example, 4 and form a 240Ah capacity, suitable for long-term backup power needs

Assembly requires high-performance BMS and precise connection process to ensure safety and reliability.

Yes, the 37101 battery supports 3C continuous discharge and 5C instantaneous discharge, which can meet the start-up and operation requirements of high-power equipment such as electric trucks.

Yes, the BMS is a necessary component for battery pack assembly. It can monitor the status of each battery cell in real time (such as voltage, temperature and current), provide safety protection (such as overcharge, over discharge, over temperature protection), and extend the service life of the battery pack.

Yes, this battery cell is optimized to support a wide operating temperature range of -20°C to 60°C. For extremely cold environments as low as -40°C, we can provide customized heating system solutions.

  • UN38.3: Meets international transportation safety requirements
  • CE: Meets EU market requirements
  • UL: Meets international safety standards
  • IEC62619: Battery safety certification suitable for energy storage and industrial applications

Yes, we provide comprehensive customization services, including:

  • Voltage and capacity adjustment (such as 51.2V 300Ah battery pack)
  • Waterproof and dustproof housing design, suitable for use in harsh environments
  • Intelligent BMS system integration, providing real-time data monitoring and remote management functions
  • Check the BMS status regularly to ensure the balance of the battery cells
  • Avoid deep discharge, it is recommended to keep the power range of 50%-60%
  • When stored for a long time, recharge the battery once every three months
  • The storage environment should be kept dry and the temperature range should be between -10°C and 30°C.

Under normal use conditions, this battery can provide more than 3,000 charge and discharge cycles, and the battery pack can last for more than 5 years.

Yes. The maximum charge rate of this battery is 1C (60A), which can complete charging in a short time, significantly improving efficiency.

This battery supports deep discharge and efficient charging characteristics, and can efficiently store and release energy between day and night, making it an ideal choice for home and commercial energy storage systems.

This battery maintains stable performance in high temperature environment, and its safety of use is further optimized through heat dissipation design, which is suitable for industrial and outdoor equipment.

Usually, the minimum order quantity is 50 pieces. If a customized battery pack is required, it can be adjusted according to the requirements.

  • Yes, we provide comprehensive technical support, including:
  • Battery pack design and configuration consultation
  • BMS system selection and commissioning support
  • Technical guidance and after-sales support during assembly

During the assembly process, high-quality connection technology, suitable BMS, and sufficient safety tests (such as overcharge, over-discharge, and short-circuit tests) must be used to ensure the safety and reliability of the final product.

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