Li ion 21700 Battery Pack

Li-ion 21700 Battery Pack

CMB’s 21700 battery pack solutions meet various industrial applications. We provide a long-lasting and reliable 21700 lithium ion battery pack over five years. To understand the 21700 cells’ performance, CMB’s engineering team tested many li ion 21700 battery cell models with high discharge and temperature tests. Our focused areas of expertise are included:

21700 Battery Pack for Your Device

The team of CMB has designed hundreds of 21700 lithium battery pack solutions for our customers. The Features of CMB’s li-ion 21700 battery pack:

  • High density and compact size
  • Wide temperature range -40°C ~60°C
  • Battery management system solutions: Basic protection with hardware BMS and smart BMS with CANBUS, RS485, and UART.
  • Customization for battery holder, nickel sheet
  • Battery package with wrap shrink or customized battery housing
How We’ll Work Together
We’ll ask questions via our inquiry about your 21700 battery-specific needs. Please provide the voltage, capacity, specific battery case, and special needs.
We’ll determine the primary 21700 battery pack for device.
We’ll estimate you according to the volume of your demand.
We’ll send you the contract once you confirm your unique 21700 battery pack solution.
We’ll provide a sample product for you to test and approve.

Custom 21700 Batteries Solution

21700 battery pack for electric surfboard

43.2V 40Ah 21700 Battery Pack for Electric Surfboard


  • Made by Samsung INR21700-40T cells
  • Self-heating and IP68 waterproof IP68
  • Special BMS management strategy with pre-discharge function
  • Customized waterproof housing and connector
  • 70A continuous discharge current and 170A peak current

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48V 20Ah 21700 Battery Pack for Electric Bike


  • Made by Samsung INR 21700-50E cells
  • Various e-bike battery cases are optional
  • Built with 30A continuous BMS
  • Compatible with 1000W motor
  • 24 months Warranty

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21700 battery pack for electric bike 1

7.4V 5000mAh 21700 Battery Pack for Medical Devices


  • Combination: 2S1P
  • Made by Samsung INR 21700-50E cells
  • PCB with over-discharge, over charge, and short circuit protection
  • With Molex connectors
  • Assembly services are welcome

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44.4V 10Ah 21700 Battery Pack for Drone


  • Made by Molicell INR21700-P42A cells
  • CMB’s engineering design of the special BMS
  • High discharge and density
  • Long lasting life cycles
  • Wide temperature range: -40°C ~60°C

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More Technical Articles On li ion 21700 battery:

Rechargeable Li ion 21700 Batteries Solution FAQ

Why CMB are the best 21700 battery pack manufacturer ?

One of the core values of CMB is quality, we not only provide the professional custom batteries design but also focus on the quality of the 21700 cells source.

What is the difference between 21700 battery pack and 18650 battery pack ?

21700 lithium ion battery has longer life cycles, higher density, higher discharge rate, and higher power than the 18650.

What kind of 21700 cell brand do you recommend ?

If your application request for lower temperature, you can choose Moli 21700. If you pursue cost performance, you can choose Samsung. To ensure your battery pack, you should choose the international cell brand in the world.

Tailored Customization

Our design team can create custom battery designs for just about any device or machine.

Timely Delivery

Our efficient production and distribution process gets your product delivered in a timely manner.

Quality Guarantee

We stand by our products and guarantee you’ll be happy with your purchase.