The 18650 Li-Ion 3.7V 2000mAh Cell is a high-quality rechargeable lithium-ion battery designed to deliver stable power for a wide range of electronic projects and portable devices. Known for its excellent energy density and long cycle life, this cell is ideal for DIY battery packs, power banks, robotics, flashlights, and solar energy storage. Its standard 18650 size ensures compatibility with common battery holders and charging circuits.
Technical Specifications
Core Specifications
Battery type: 18650 lithium-ion rechargeable cell
Nominal voltage: 3.7 V
Capacity: 2000 mAh (typical)
Fully charged voltage: 4.2 V
Discharge cutoff voltage: ~2.5 V
Electrical & Physical
Continuous discharge current: up to 2 C (approx. 4 A, varies by brand)
High energy density with low self-discharge rate
Standard cylindrical size: 18 mm diameter × 65 mm length
Flat-top terminal design for use in packs or holders
Environmental
Operating temperature range: –20 °C to +60 °C (discharge)
Charging temperature range: 0 °C to +45 °C
Cycle life: typically 300–500 charge/discharge cycles
Why Choose the 18650 2000mAh Cell
Reliable rechargeable power source with long service life
High energy density provides extended runtime for devices
Compatible with standard 18650 holders, chargers, and BMS systems
Critical Uses
DIY lithium-ion battery packs and power banks
Arduino and Raspberry Pi portable projects
LED flashlights and headlamps
Solar energy storage and emergency backup systems
RC toys, robotics, and other high-drain electronics
Pro Tips
Always charge with a dedicated lithium-ion charger and proper BMS protection
Avoid overcharging above 4.2 V or discharging below 2.5 V
Use cells of matching capacity and charge level when building multi-cell packs
Do not short-circuit or expose to high heat for safety
Package Includes
1 × 18650 Li-Ion 3.7V 2000mAh Rechargeable Cell