The 18650 Cylindrical Lithium Battery is a protected 1S1P battery assembly designed for integration into compatible portable electronic devices and custom OEM equipment. It uses one 2600mAh cylindrical lithium-ion cell and provides a nominal voltage of 3.6V with a rated energy of 9.36Wh.

Unlike unprotected bare 18650 batteries, this product includes a YH-TKSN-6226 protection board, PVC film, Qingke paper, a 60mm wire and a ZH1.5-2P connector. The finished assembly measures approximately 21 × 66mm and weighs approximately 45g.

This 3.6 volt lithium battery can be evaluated for devices that require a compact rechargeable power source with protection and a wired connection. Zenilove also provides different cylindrical lithium battery solutions for OEM projects with different voltage, size, and integration requirements.

Device voltage, continuous current, peak current, runtime, available space and connector polarity should be confirmed before selection.

Advantages of the 18650 Lithium Battery

Compact 1S1P Battery Configuration

The battery uses one cylindrical cell in a 1S1P configuration. Its compact structure helps simplify installation in devices with limited battery space.

The finished dimensions are approximately 21 × 66mm, including the protection board, insulation and wrapping materials.

The 1S1P structure provides a simple battery architecture for products that require a compact rechargeable power source without multiple-cell series or parallel combinations.

2600mAh Capacity and 9.36Wh Energy

This 18650 lithium battery provides a typical capacity of 2600mAh and a listed minimum capacity of 2500mAh. Its rated energy is 9.36Wh.

The battery capacity and runtime should be assessed according to the actual operating current of the device rather than capacity alone.

For OEM applications, buyers should compare energy requirements with device power consumption, expected working time, and available installation space before confirming the battery specification.

Nominal 3.6V Output

The battery provides a nominal voltage of 3.6V and uses a 4.2V charging voltage. It should be charged with a compatible lithium-ion CC/CV charging system.

The listed standard charging current is 0.2C, or 520mA. The maximum listed charging current is 1C, or 2.6A.

The final charging method should be confirmed against the approved battery specification and device charging circuit.

Integrated Battery Protection

The standard assembly includes protection against:

• Overcharge
• Over-discharge
• Overcurrent
• Short circuit

The protection board has a listed overcharge protection voltage of 4.28 ± 0.05V and an over-discharge protection voltage of 2.40 ± 0.1V.

The listed 5–9A value refers to the protection board’s overcurrent protection range. It should not be treated as the confirmed continuous discharge current of the battery.

A suitable protection design helps reduce risks caused by abnormal charging, excessive discharge, and unexpected current conditions during device operation.

Ready-to-Connect Wire and Connector

The standard 18650 Cylindrical Lithium Battery includes 1571-26 wire with a standard length of 60mm and a ZH1.5-2P connector.

This wired design can reduce additional assembly work when the connector, wire length and polarity match the target device.

For projects requiring different connection methods, Zenilove can review options such as connector types, wire lengths, and wiring configurations based on device requirements.

Operating Temperature Range

The listed operating temperature ranges are:

• Charging: 0°C to 45°C
• Discharging: -20°C to 60°C

The battery should be stored at approximately 25 ± 5°C with a recommended state of charge of around 40%–50%.

Operating temperature, charging conditions, and storage environment should be considered when evaluating battery performance for different applications.

Standard Battery Configuration