7.4 Volt 2600 mAh Li-Ion Battery Pack - With Protection IC

Features

1. High Energy Density: The 18650 format offers a high capacity of 2600mAh in a compact size, providing long runtime for portable devices .

2. Integrated Comprehensive Protection: The built-in Protection IC safeguards the battery and the host device against common fault conditions like overcharge, over-discharge, overcurrent, and short circuits, enhancing safety and reliability .

3. Long Cycle Life: Can withstand over 500 charge-discharge cycles while maintaining more than 80% of its initial capacity, ensuring good longevity .

4. Wide Operating Temperature Range: Suitable for use in various environments .

5. Low Self-Discharge: Retains charge for extended periods when not in use .

Specifications

Protection Features (Integrated Protection IC)

The battery pack includes a Protection Circuit Module (PCM) with the following typical protection parameters :

• Overcharge Protection: 4.25V ± 0.025V per cell  / 4.28V ± 0.02V per cell  (-ΔV detection, cuts off charge circuit)

• Overcharge Release: 3.8V ~ 4.2V per cell (Automatic recovery when voltage drops) 

• Over-Discharge Protection: 2.4V ± 0.05V per cell  / 2.50V ± 0.10V per cell  (-ΔV detection, cuts off discharge circuit)

• Over-Discharge Release: 2.8V ~ 3.2V per cell (Automatic recovery after charging) 

• Overcurrent Protection: 3A ~ 6A  / 10A ~ 17A  (-ΔV detection, cuts off discharge circuit)

• Short Circuit Protection: Immediate trip (e.g., VSS < 0.15V for t > 10ms) 

• Temperature Protection: NTC thermistor typically integrated for external monitoring or internal cutoff 

• Balance Function: Passive cell balancing during charging to ensure voltage uniformity between cells 

Applications

• Consumer Electronics: Cordless phones, portable audio players (MP3), digital cameras, camcorders, handheld gaming devices .
• Portable Lighting: High-lumen flashlights, LED work lights, emergency lights .
• Communication Devices: Two-way radios, intercoms .
• Medical Equipment: Portable monitors, diagnostic devices .
• Industrial Instruments: Handheld scanners, data loggers, measurement devices .
• Other: Toys, laser pointers, small fans, portable printers .

Warnings & Precautions

Charging

• Use a Li-ion Specific Charger: Always use a charger designed for Li-ion chemistry and configured for this battery's voltage (8.4V) and current limits (≤2000mA). 

• Avoid Overcharging: The protection IC is a backup. Do not rely on it exclusively. Do not leave the battery charging unattended for extended periods. Disconnect the charger once charging is complete .

• Temperature Monitoring: Charge only within the specified temperature range (0°C to +45°C). Charging outside this range, especially below 0°C, can cause permanent damage .

Discharging

• Avoid Deep Discharge: While the protection IC will cut off discharge, avoid regularly draining the battery until the device shuts off. Do not discharge below the cut-off voltage .

• Current Limits: Do not exceed the maximum continuous discharge current (2000mA or 2600mA as per spec). Exceeding limits causes overheating, damage, and safety risks .

• Temperature Management: Avoid discharging outside the recommended range (-20°C to +60°C). Extreme cold reduces performance; extreme heat accelerates aging and increases risks .

Storage

• Partial Charge Storage: For long-term storage (longer than one month), store the battery at a 30%-50% State of Charge (SOC). Avoid storing fully charged or fully discharged .

• Cool and Dry Environment: Store in a cool, dry place away from direct sunlight and heat sources. Ideal storage temperature is -5°C to +20°C .

• Regular Checks: If stored for very long periods, check the voltage every 3-6 months and recharge if it drops near the over-discharge protection voltage.