18650 Rechargeable Lithium-Ion Cell

Overview

A rechargeable 18650 lithium-ion cell with a 3.7 V nominal voltage (4.2 V when fully charged). It fits standard 18650 holders, battery boxes and power bank cases, and suits low-drain loads such as microcontroller boards, sensors, small robots and torches.

This cell is intended for low-drain use. It is not suitable for high-discharge applications such as e-bikes, scooters or power tools.

Typical Applications

• Powering Arduino, ESP32 and other microcontroller projects
• Small robots and portable prototypes
• DIY power banks and battery boxes
• Torches and other low-drain devices

Compatibility

Fits 18650 holders and enclosures, such as our 1x and 2x 18650 battery holders and the 6-cell power bank case. For multi-cell packs, use a protection board matched to the cell count, such as a 3S BMS for three cells in series.

Important Notes / Safety

• Charge only with a charger or charging module designed for lithium-ion cells (4.2 V cut-off).
• Do not short-circuit, puncture, crush or heat the cell, and do not use a cell whose wrap is torn or damaged.
• In series or parallel packs, use cells of the same type and capacity at the same state of charge, with a suitable protection board.
• Store away from heat and flammable materials, and keep out of reach of children.