Li-ion Battery 18650 - Originally Up to 2000mAh

Li-ion Battery 18650 (Up to 2000mAh) is a rechargeable cylindrical lithium-ion power cell designed for portable electronics, custom power packs, DIY flashlights, and robotics projects. Featuring the standard 18650 form factor (18mm diameter by 65mm length), this dependable energy storage cell delivers a nominal voltage of 3.7V with a reliable capacity of up to 2000mAh. Offering a high energy density, low self-discharge rate, and no memory effect, it serves as an economical and rechargeable power source for wireless sensor nodes, portable gadgets, power banks, and multi-cell battery packs.

Features

• Standard 18650 cylindrical form factor (18 mm x 65 mm) ensuring universal compatibility with standard battery holders and slots
• Nominal operating voltage of 3.7V DC (fully charged at 4.2V, safe discharge cutoff down to 2.75V)
• Generous energy storage capacity of up to 2000mAh for sustained runtime in portable applications
• Low self-discharge rate, retaining charge efficiently over long periods of non-use
• Chemical stability with built-in safeguards against the memory effect, allowing partial recharging without degrading total capacity
• Reliable high energy density suitable for high-drain electronics, solar lighting systems, and robotics
• Available in flat-top or button-top configurations to match various mechanical holder designs

Applications

• Power sources for 2WD/4WD robotic cars, Arduino/ESP32 mobile robot chassis, and wireless controllers
• DIY power banks, portable USB chargers, and backup battery packs
• High-intensity LED flashlights, headlamps, and emergency tactical lights
• Solar-powered garden lamps, automated IoT monitoring nodes, and remote sensor stations
• Polytechnic diploma, university engineering thesis, and DIY electronics power projects

Important Notes:

• Overcharge & Over-discharge Protection: Lithium-ion cells are sensitive to voltage extremes. Never overcharge a cell above 4.2V or discharge it below 2.75V, as this can permanently damage the chemistry or cause thermal instability. It is strongly recommended to use cells with a dedicated Battery Management System (BMS) or PCM (Protection Circuit Module).
• Polarity Care: Always observe correct positive (+) and negative (-) terminal alignment when placing cells into battery holders or when spot-welding nickel strips.
• Safe Handling: Do not puncture, crush, short-circuit, or expose the battery to high temperatures or open flames. Store unused cells in a cool, dry place.
• Soldering Caution: Avoid soldering wires directly onto the terminals of bare Li-ion cells with a standard soldering iron, as the excessive heat can damage the internal seals and chemistry. Use pre-spot-welded tab cells or battery holders instead.

Package includes

• 1 x Li-ion Battery 18650 (Up to 2000mAh)