Elevate Your Power Game IMREN 21700-3750-40A Lithium Battery Review  IMREN Battery

Elevate Your Power Game: IMREN 21700-3750-40A Lithium Battery Review | IMREN Battery

In the realm of rechargeable lithium batteries, IMREN stands tall as a trusted name synonymous with quality and innovation. Among its array of offerings, the IMREN 21700-3750-40A Rechargeable Lithium Battery shines as a beacon of reliability and performance, catering to the diverse needs of consumers. This review aims to dissect the features and advantages of this cutting-edge battery, ensuring that you make an informed decision when seeking a dependable power solution.

Key Specifications:

  • Manufacturer: IMREN
  • Model: 21700-3750-40A
  • Size: Φ=21mm, H=70mm
  • Positive Terminal: Flat Top
  • Nominal Capacity: 3750mAh
  • Nominal Voltage: 3.7V
  • Standard Charge: CCCV, 1.50A, 4.20V±0.05V, 150mA cut-off
  • Standard Discharge: 40A
  • Charging Time: 2-3 hours, 3750mA(1.0C 5rate)
  • Initial Impedance: 13-16mΩ
  • Weight: 55.0g±2g
  • Operating Temperature: Charging: 0℃45℃ Discharging: -20℃60℃
  • Storage Temperature: -20~45℃
  • Storage Humidity: ≤75% RH
  • Warranty: 1 Year

Unmatched Performance:

With a nominal capacity of 3750mAh and a nominal voltage of 3.7V, the IMREN 21700-3750-40A Battery offers sustained power delivery for a wide range of devices. Its robust design and high standard discharge rate of 40A ensure reliable performance, making it an ideal choice for both casual users and enthusiasts with demanding power needs. Whether you're vaping, capturing memories with your camera, or powering your favorite gadgets, this battery keeps you going.

Efficient Charging:

Equipped with CCCV charging technology, the IMREN battery facilitates safe and efficient charging, minimizing the risk of overcharging and maximizing battery longevity. The standard charge parameters, including a 1.50A charging current and precise voltage control, ensure optimal charging performance. With a charging time of 2-3 hours, users can quickly replenish the battery's power, minimizing downtime and maximizing productivity.

Durable Design:

Crafted with durability in mind, the IMREN 21700-3750-40A Battery boasts a sturdy construction that withstands the rigors of daily use. Its flat top positive terminal ensures compatibility with a wide array of devices, enhancing convenience and versatility. Moreover, with an initial impedance of 13-16mΩ, this battery offers low internal resistance, facilitating efficient energy transfer and overall enhanced performance.

Versatile Applications:

From powering high-performance flashlights to driving power-hungry devices, the IMREN 21700-3750-40A Battery caters to a diverse range of applications. Its wide operating temperature range and reliable performance in extreme conditions make it an indispensable companion for outdoor adventures, professional settings, and everyday use. Whether you're on the move or tackling demanding projects, this battery ensures consistent and reliable power delivery.


In conclusion, the IMREN 21700-3750-40A Rechargeable Lithium Battery exemplifies IMREN's commitment to excellence and innovation. With its impressive specifications, durable design, and versatile applications, it offers unparalleled performance and reliability for a myriad of users. Invest in the IMREN 21700-3750-40A Battery today and experience the difference it makes in powering your devices and applications.

Disclaimer: Always adhere to safety precautions and manufacturer recommendations when handling and using rechargeable lithium batteries. Improper usage may result in damage to property or personal injury.

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