3.7V 18650 Li-ion Battery – 2000mAh Rechargeable Cell for Arduino, Flashlights & DIY Projects
The 3.7V 2000mAh 18650 Li-ion Battery is a rechargeable, high-performance lithium-ion cell designed for powering a wide range of electronic devices and DIY systems. Commonly used in flashlights, battery packs, Arduino projects, power banks, and IoT applications, it offers reliable energy with a long recharge cycle life.
 
Key Features:
2000mAh Capacity
Offers dependable power for portable devices and embedded electronics.
Standard 18650 Size
Compatible with most 18650 holders, battery cases, and charging circuits.
3.7V Nominal Voltage
Suitable for Arduino, ESP32, sensors, and other low-voltage systems.
Rechargeable and Reusable
Can be charged hundreds of times using proper lithium chargers.
Available with or without Protection Circuit
Protection circuit helps prevent overcharge, over-discharge, and short circuits (varies by model).
 
Applications:
Flashlights and emergency lights
DIY power banks and battery packs
Arduino and microcontroller projects
Portable fans and LED lamps
IoT devices and sensors
Robotics and wireless modules
 
Package Includes:
1 × 3.7V 2000mAh 18650 Li-ion Battery
 
Specifications:
Battery Type: Lithium-Ion (Li-ion)
Model: 18650
Nominal Voltage: 3.7V
Capacity: 2000mAh
Charging Voltage: 4.2V max
Rechargeable: Yes
Protection Circuit: Optional (based on variant)
Terminal Type: Flat top (or button top if specified)
 
Dimensions:
Length: 65 mm
Diameter: 18 mm
 
Weight: Approx. 40–45 grams
 
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