Customized Battery Solution Expert

Custom Lithium-ion batteries and battery packs

» Custom Lithium-ion batteries and battery packs

Lithium Ion 18650 3.7V 4000mAh rechargeable battery pack for power bank and LED flashlight

Custom Lithium-ion batteries and battery packs
  • Specifications



Max Charge Voltage:4.2V

Charge Current:0.5C-3C

Cycle Life:More than 500 times

Working Temperature:Charge:0-45℃,Discharge:-30-60℃


Battery Dimension:Customized

Battery Features:

1: High energy density
2: High working voltage for single battery cells
3: Pollution-free
4: Long cycle life
5: No memory effect
6: Capacity, resistance, voltage, platform time consistency is good
7: With short-circuit production function, safe and reliable
8: Good consistency, low self-discharge
9: Light weight, small and customized size
10: Wide application for electronics and industry


1. Emergency power supply, LED light & flashlight: headlamp, emergency light, solar flashlight, searchlight, lantern, bicycle light, bright flashlight, high-end lamp, military flashlight and so on.
2. Home appliance products: electric vacuum cleaner, electric sweeper, water meter, gas meter, electric children toys, electric warm shoes, electric blanket, TV remote control (RC) and so forth.
3. Consumer applications, communicate & telephone equipment: MPS, tablet PC, laptop, Bluetooth earphone, power bank, portable DVD player, speaker, microphone, sound equipment, audio, digital camera and others
4. Outdoor sports products: camping light, mountain bike light, solar emergency light, self-defense flashlight and that.
5. Electronic tools & electric transportation vehicles: electric bike, electric car. E-scooter, electric motor and all that.
6. Solar lamp, remote control
7. Medical device
8. Backup power supply
9. Electrical and hobby
10. UPS, GPS and so on.


Enquiry Form (we will get back to you ASAP)


3 + 5 = ?

Maybe you like also

  • About Us

    We specialized in customize all kinds of rechargeable batteries and battery packs for more than 10 years, including Lithium-ion battteries, Lithium-Polymer batteries,Ni-MH batteries,Ni-CD batteries,LiFePO4 batteries.


  • How to get your batteries

    Firstly,please send us your battery specification requirements.Secondly,after all details informations are confirmed,battery samples will be arranged for your testing.Thirdly,Mass production will be arranged after samples are approved.

  • Certifications

    Required certifications can be made according to customers’ requirements.

  • Contact Information

    Tel No:0755-82772785
    Email: [email protected]
    Skype: knytechnology