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Rechargeable Li‑ion Battery 18650 3.7 V 2600 mAh – 3000 mAh – UltraFire (Red)
🔋 Rechargeable Li‑ion Battery 18650 3.7 V 2600 mAh – 3000 mAh – UltraFire (Red)
Overview
A dependable and compact 3.7 V 18650 lithium‑ion rechargeable battery from UltraFire in a vibrant red sleeve. Ideal for portable power, this cell is perfect for powering flashlights, DIY electronics, custom battery packs, and Microcontroller projects like Arduino and ESP32.
Key Features
Nominal voltage: 3.7 V
Capacity options: 2600 mAh – 3000 mAh (UltraFire variants)
Rechargeable up to ~800 cycles
Button-top or flat-top terminals; available with or without protection circuit
Technical Specifications
| Parameter | Value |
|---|---|
| Cell Size | 18 mm × 65 mm (standard 18650) |
| Chemistry | Lithium‑ion |
| Nominal Voltage | 3.7 V |
| Capacity | 2600–3000 mAh |
| Max Discharge Current | ≈5 A |
| Charge Cut‑Off Voltage | 4.2 V |
| Discharge Cut‑Off | 2.75 V |
| Protection | Optional PCB protection for safety |
| Cycle Life | Up to 800 full cycles |
| Certifications | CE, FCC, MSDS, UN38.3 (varies by model) |
Applications
DIY power banks and portable chargers
High-current devices: flashlights, motors, lasers
Arduino/ESP32 battery-backed projects
Battery packs for robotics, RC, IoT, and more