The FKB 18650-26 is an unprotected lithium-ion cell in the standard 18650 format, delivering 3.6V nominal voltage and 2600mAh capacity. Flat positive and negative terminals make it suitable for spot-welded packs and professional electronics where a protection PCB is added externally.

Li-ion chemistry gives a high weight-to-power ratio versus alkaline or NiMH equivalents, with a 500-cycle service life and a wide -10 to +60°C operating window.

Key Features

• 18650 cylindrical format, 65x18.4mm
• 3.6V nominal voltage and 2600mAh capacity
• Flat-pole terminals for pack assembly
• Unprotected cell for professional integration with external BMS
• 500-cycle service life under standard charge profile

Product Benefits

• Compatible with the wide ecosystem of 18650-based torches, power tools and pack builds
• Constant current / constant voltage charging keeps cycle life predictable
• Standard 1300mA charge rate completes in roughly 2 hours
• Maximum 5200mA discharge supports moderate-load applications
• Wide operating range from -10 to +60°C suits varied environments

Technical Specifications

• Brand: FKB
• Model: 18650-26
• Chemistry: Lithium-ion
• Format: 18650
• Voltage: 3.6V
• Capacity: 2600mAh
• Terminal Layout: 52
• Terminals: Flat
• Dimensions: 65x18.4mm
• Weight: 45g
• Usage: Professional electronics
• Cycle Life: 500 cycles
• Charging: Constant Current / Constant Voltage
• Charging Voltage: 4.2V
• Standard Charge Current: 1300mA (2 hours)
• Maximum Discharge Current: 5200mA
• Operating Temperature: -10 to +60°C
• Protection Circuit: No

Why You'll Love It

• Reliable 18650 cell for replacement and pack-building projects
• Flat terminals make spot welding and holder mounting straightforward
• Generous 2600mAh capacity with predictable cycle behaviour
• Package includes 1x FKB 18650-26 lithium battery 3.6V 2600mAh