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Cylindrical lithium polymer battery

Cylindrical lithium-ion batteries are categorized into steel-case and pouch-type designs. Representative steel-case models include 18650 and 21700, while pouch-type models include 09500, 21350, and 18650. With the positive and negative terminals located at each end and a cylindrical structure, these batteries are widely used in digital electronic products, energy storage systems, and robotic applications.

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iRay Polymer Lithium-ion Battery Model List

Here are the detailed specifications of our mass-produced lithium polymer batteries. If you have any questions, please feel free to contact us.

Cell modelVoltageCapacityCharge
current		Discharge
current		Plus
current		ResistanceSizeWeightPower
IFR18650-1600mAh3.2V1600mAh1C3C10A,5S≤40mΩφ18.45*65.3mm39.5g130Wh/Kg
IFR18650-1800mAh3.2V1800mAh1C3C10A,5S≤40mΩφ18.45*65.3mm41.5g139Wh/Kg
IFR26650-3200mAh3.2V3200mAh1C3C15A,5S≤30mΩφ26.2*65.6mm84.0g122Wh/Kg
IFR26650-3600mAh3.2V3600mAh1C3C20A,5S≤25mΩφ26.2*65.6mm85.0g136Wh/Kg
IFR26650-3800mAh3.2V3800mAh1C3C20A,5S≤25mΩφ26.2*65.6mm87.5g139Wh/Kg
IFR26650-4000mAh3.2V4000mAh1C3C20A,5S≤25mΩφ26.2*65.6mm87.5g146Wh/Kg
IFRP18650-1100mAh3.2V1100mAh5C10C40A,10S≤18mΩφ18.45*65.3mm39.5g89Wh/Kg
IFRP26650-3000mAh3.2V3000mAh3C10C45A,5S≤15mΩφ26.2*65.6mm81.5g118Wh/Kg
INR18650-2200mAh3.6V2200mAh1C3C10A,5S≤35mΩφ18.45*65.3mm42.5g186Wh/Kg
INR18650-2600mAh3.6V2600mAh1C2C8A,5S≤35mΩφ18.45*65.3mm45.0g208Wh/Kg
INR26650-5000mAh3.6V5000mAh1C2C15A,5S≤30mΩφ26.2*65.6mm92.5g195Wh/Kg
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FAQs

What is a cylindrical lithium polymer battery?

A cylindrical lithium polymer battery is a lithium-ion cell packaged in a cylindrical structure. It can be either a traditional steel-case design or a soft-pack cylindrical cell sealed with aluminum-plastic laminate film.

The main difference lies in the packaging. Steel-case cylindrical batteries are sealed with a steel shell and cap crimping process, while soft-pack cylindrical batteries are heat-sealed using aluminum-plastic laminate film.

Common models include 18650, 21700, and 26650 for steel-case cylindrical batteries, and 09500, 16450, 21350, 18650, and 23600 for soft-pack cylindrical batteries. Since soft-pack cylindrical cells allow higher customization with aluminum-plastic laminate cases, they can be made into various non-standard sizes.

Steel-case cylindrical batteries are typically used in power tools and robotic devices, where multi-series and parallel cell combinations are common and consistency of individual cell dimensions is critical. This makes steel-case cylindrical cells advantageous. Soft-pack cylindrical batteries, on the other hand, are preferred in products like e-cigarettes due to their lightweight and high customization flexibility.

Cylindrical batteries feature mature manufacturing processes, high automation in production, and excellent consistency, especially in steel-case cylindrical types.

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