Samsung ICR18650-30B 18650 Flat-Top Li-Ion Battery 3.7V 2950mAh

With a 2950mAh capacity and 3.7V nominal voltage, the Samsung ICR18650-30B delivers 10.9Wh of energy in a compact 18650 form factor. This flat-top lithium-ion cell is engineered for dependable power in flashlights, power banks, and laptop battery packs.

Overview

The ICR18650-30B uses lithium cobalt oxide chemistry and is rechargeable, with a standard charge current of 1475mA and a charging voltage of 4.2V. It supports a maximum continuous discharge current of 4.4A and has an internal resistance below 50mΩ. The cell is unprotected, so an external protection circuit is required for safe operation in most devices.

What stands out

• High energy density: 2950mAh capacity and 10.9Wh energy
• Flat-top design for easy integration into battery packs
• Wide operating temperature range: -20°C to 60°C discharge, 0°C to 45°C charge
• Long cycle life: 300 cycles to 80% capacity

Technical details

• Battery Chemistry: Lithium-Ion (LiCoO2)
• Battery Size: 18650
• Nominal Voltage: 3.7V
• Capacity: 2950mAh
• Energy: 10.9Wh
• Form Factor: Flat-Top
• Rechargeable: Yes
• Max Continuous Discharge Current: 4.4A
• Charging Voltage: 4.2V
• Standard Charge Current: 1475mA
• Internal Resistance: < 50mΩ
• Protection Circuit: Unprotected
• Operating Temperature (Charge): 0°C to 45°C
• Operating Temperature (Discharge): -20°C to 60°C
• Cycle Life: 300 cycles to 80% capacity

Our verdict

A reliable high-capacity 18650 cell for DIY battery packs and high-drain devices, provided you add your own protection circuit.