📌 Overview
The OpenELAB 1-Pack 3C INR 21700 4000mAh 3.7V Lithium-Ion Batteries provide dependable, rechargeable energy for high-drain electronics. With a 4000mAh capacity and a 3C discharge rate (up to 12A), these cells are engineered to deliver endurance, safety, and stable output across demanding applications.
⚙️ Key Specifications
Cell Type: INR21700, cylindrical
Dimensions: 21.7 × 70.0 mm
Weight (per cell): ~68 g
Nominal Capacity: 4000 mAh
Nominal Voltage: 3.7 V
Max Continuous Discharge: 3C (up to 12 A)
Energy: ~14.8 Wh per cell
Top Type: Flat top
Cycle Life: 500–1000 cycles
Pack Size: 1 cells included
🧪 Performance Highlights
Reliable Capacity: 4000mAh supports extended runtime in portable devices
High Output: 12A continuous discharge powers high-demand electronics
Safe Chemistry: INR formulation ensures stable operation under load
Durable Design: Rated for 500+ charge cycles with consistent performance
Temperature Range: Operates from -20 °C to +60 °C
📊 Applications
High-power LED flashlights
Cordless tools and e-bike battery packs
Solar lighting and backup energy systems
DIY robotics and custom battery projects
Other electronics requiring strong, stable current
📦 Package Contents
1 × OpenELAB INR21700 4000mAh 3.7V rechargeable batteries
Protective packaging for safe delivery
✅ Why OpenELAB?
🔋 Trusted INR lithium-ion chemistry for safety and performance
⚡ 3C discharge rate (12A) for demanding applications
🌱 Rechargeable and RoHS/CE/UN38.3 certified
🛠️ Compatible with standard 21700 flat-top battery holders