3.7V 18650 Li-ion Battery – 2500mAh Rechargeable Cell for DIY Electronics & Power Banks
The 3.7V 18650 Li-ion Battery (2500mAh) is a high-capacity rechargeable cell commonly used in portable electronics, power banks, flashlights, DIY projects, and robotics. With reliable performance and long cycle life, it's a popular choice for powering Arduino, ESP32, and other microcontroller-based systems.
 
Key Features:
2500mAh High Capacity
Provides extended backup power for a wide range of low and moderate power devices.
Standard 18650 Size
Fits into standard 18650 battery holders and slots; widely used in electronics and custom battery packs.
Rechargeable Lithium-Ion Chemistry
Offers a good balance of energy density, weight, and cycle life.
Wide Application Range
Can power everything from LED lights and power banks to wireless modules and small motors.
Optional Protection Circuit (varies by variant)
Available with or without built-in PCB for overcharge, over-discharge, and short-circuit protection.
 
Applications:
Power banks and USB chargers
Arduino, ESP32, and Raspberry Pi projects
Flashlights and headlamps
RC cars, boats, and drones
Portable audio and IoT devices
DIY electronics and battery backup systems
 
Package Includes:
1 × 3.7V 2500mAh 18650 Li-ion Battery
 
Specifications:
Model: 18650
Battery Type: Li-ion (Lithium-Ion)
Nominal Voltage: 3.7V
Capacity: 2500mAh
Charging Voltage: 4.2V max
Discharge Cutoff: ~2.5V
Rechargeable: Yes
Protection Circuit: Optional (specify if included)
Terminal Type: Flat top (or button top if applicable)
 
Dimensions:
Length: 65 mm
Diameter: 18 mm
 
Weight: 45 grams
 
People Also Search For:
18650 3.7V battery 2500mAh
Rechargeable Li-ion battery for Arduino
Power bank battery cell
18650 lithium battery
2500mAh 3.7V battery
Li-ion battery for flashlight
DIY battery for electronics
18650 battery for ESP32