The Li-Ion 3.7V 18650 Rechargeable Battery Cell (1500mAh) is a reliable and rechargeable lithium-ion battery designed to provide stable and long-lasting power for a wide range of portable electronic devices and DIY projects. With a nominal voltage of 3.7V and a capacity of 1500mAh, this battery offers an excellent balance of performance, portability, and rechargeability.
The standard 18650 cylindrical form factor makes it compatible with numerous battery holders, flashlights, emergency lights, power banks, robotics, IoT devices, and battery-powered electronics. The battery features low self-discharge, high energy density, and supports hundreds of charge/discharge cycles when used with a compatible lithium-ion charger and protection circuit.
Key Features
- Rechargeable Lithium-Ion Battery Cell
- Standard 18650 Cylindrical Size
- Nominal Voltage: 3.7V
- Capacity: 1500mAh
- High Energy Density
- Low Self-Discharge Rate
- Long Cycle Life
- Lightweight and Compact Design
- Suitable for Battery Packs and Portable Devices
- Ideal for DIY Electronics and Embedded Projects
Technical Specifications
- Product Type: Rechargeable Lithium-Ion Battery
- Battery Chemistry: Lithium-Ion (Li-Ion)
- Battery Size: 18650
- Nominal Voltage: 3.7V
- Fully Charged Voltage: 4.2V
- Nominal Capacity: 1500mAh
- Rechargeable: Yes
- Battery Shape: Cylindrical
- Diameter: Approximately 18mm
- Length: Approximately 65mm
- Protection Circuit: Depends on the battery version (Protected or Unprotected)
- Operating Temperature: Varies by manufacturer
- Cycle Life: Typically 300–500 charge/discharge cycles (depending on usage and charging conditions)
Working Principle
The 18650 lithium-ion battery stores electrical energy through the movement of lithium ions between the positive and negative electrodes during charging and discharging.
- Charging: Lithium ions move from the positive electrode to the negative electrode, storing energy.
- Discharging: The stored lithium ions move back to the positive electrode, releasing electrical energy to power connected devices.
This rechargeable chemistry provides high energy density and consistent voltage output, making it suitable for portable electronic applications.
Applications
- Flashlights and LED Torches
- Power Banks
- Arduino and ESP32 Projects
- Robotics and Automation
- Portable Electronic Devices
- DIY Battery Packs
- Solar Energy Storage Projects
- Emergency Lighting Systems
- Wireless Electronic Devices
- IoT and Embedded Systems
Advantages
- Rechargeable and reusable
- High energy density
- Lightweight and compact
- Stable output voltage
- Low self-discharge
- Long operational lifespan
- Suitable for a wide range of electronic applications
- Cost-effective compared to disposable batteries
Usage Tips
- Charge only with a compatible Li-Ion battery charger designed for 3.7V (4.2V full-charge) lithium-ion cells.
- Do not overcharge, over-discharge, short-circuit, or puncture the battery.
- Use a Battery Management System (BMS) or protection circuit when building battery packs.
- Store the battery in a cool, dry place away from direct sunlight and heat.
- Do not expose the battery to water, fire, or extreme temperatures.
- Inspect the battery regularly and discontinue use if it becomes damaged, swollen, or leaks.
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