18650 battery 3.7 v 2200mah​
icr 18650 battery 2200mah 3.7v
rechargeable li ion battery 3.7 v 2200mah 18650​

3.7V Lithium Ion Battery Cell 18650 2200mAh 8C

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Summary of 18650 2200mAh 8C ICR 18650 Battery​

The 3.7V 18650 2200mAh 8C lithium-ion battery delivers a balanced combination of high power output, stable capacity, and long cycle life in a standard 18650 form factor. With an 8C continuous discharge rate (up to 17.6A), low internal resistance, and reliable thermal performance, it is well suited for power tools, e-bikes, RC models, and other motor-driven or high-current applications. Certified to UN38.3, IEC 62133, RoHS, and MSDS standards, this cell ensures safety, compliance, and easy integration into OEM battery packs when combined with proper cell matching and BMS protection.

18650 Lithium Ion Rechargeable Battery​ Specification

Model: Lithium Rechargeable Batteries​

Rated Capacity: 2200mAh

Energy: 8.14Wh

Energy Density: 180.89Wh/kg

Minimum Capacity: 2150mAh

Rated voltage: 3.7V

Discharge Cut-off Voltage: 2.75V

Charge Cut-off Voltage: 4.2V

Cycle Life: More than 500 cycles

Dimensions: Φ18*65mm

Weight: 45g

Internal Resistance: Less than 20mΩ

Standard Discharge Current: 0.2C (440mA)

Standard Charge Current: 0.2C (440mA)

Max Continuous Discharge Rate: 8C (17.6A)

Max Continuous Charge Current: 1C (2.2A)

Charging Temperature: 0 to 45℃;

Discharge Temperature: -20 to 65℃

Storage Temperature:

  • -20℃~25℃: 12 months
  • -20℃~45℃: 3 months
  • -20℃~60 ℃: 1 month

Key Features

✅ High Power Output

The 8C discharge rating allows continuous current draw up to 17.6A, supporting devices with significant energy demands.

🔋 Reliable Capacity

2200mah rechargeable battery​ is sufficient for medium-duty applications, balancing runtime and power delivery.

♻️ Rechargeable with Long Cycle Life

Lithium-ion chemistry enables hundreds of reliable charge-discharge cycles.

🔒 Thermal Stability and Low Self-Discharge

Safe operation with reduced risk of overheating and extended shelf life.

⚡ Compact and Lightweight

Ideal for portable electronic designs where space and weight are limited.

Due to the powerful performance and standard 18650 format, the 18650 battery 3.7 v 2200mAh is widely used in:

🔦 LED Flashlights & Tactical Torches

🛠 Cordless Power Tools

🛴 Electric Scooters & E-bikes

🚁 RC Cars and Drones

🔋 Battery Packs for DIY Projects

📡 Wireless Devices and IoT Sensors

Its high discharge capacity makes it especially suitable for motor-driven and pulse-current-demanding applications.

Cell Matching & Battery Pack Integration

When assembling battery packs for tools, e-bikes, or robotics, cell matching is essential. Always choose:

  • Cells from the same manufacturer and batch

  • Cells with identical capacity, voltage, and internal resistance

  • Use a Battery Management System (BMS) for:

    • Overcharge protection

    • Over-discharge protection

    • Short-circuit prevention

    • Cell balancing

❓ FAQ – Frequently Asked Questions

Q1: How long does it take to charge a 2200mAh battery?

A 2200mAh battery typically takes about 5–6 hours to fully charge at a standard 0.2C charge rate (around 440mA). With a faster 1C charger (2.2A), charging time can be reduced to about 1.5–2 hours, depending on the charger and battery protection system.

Q2: Is it bad to keep lithium batteries fully charged?

Yes, keeping lithium batteries fully charged for long periods can accelerate capacity loss and reduce overall lifespan. For storage or infrequent use, maintaining the battery around 40–60% charge is healthier.

Q3: How long will 2200mAh last?

How long a 2200mAh battery lasts depends on the load: at a 1A draw, it will run for about 2.2 hours. Higher current devices will drain it faster, while lower-power devices can extend runtime significantly.

Q4: Can you over-discharge an 18650 battery?

Yes, an 18650 battery can be over-discharged if its voltage drops below the safe cutoff (typically around 2.5–2.75V). Over-discharge can cause permanent capacity loss, instability, or safety risks, which is why a BMS or protection circuit is essential.

Q5: How to tell if a lithium battery is overcharged?

A lithium battery may be overcharged if its voltage exceeds the rated limit (typically above 4.2V for Li-ion) or if it becomes unusually hot, swollen, or emits a smell. Overcharging often triggers a protection circuit, so abnormal charger behavior or sudden shutdown can also be warning signs.

 

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