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Pricelist: Retail Price (B2C) Pricelist
18650 3.7V 2000mAh Lithium-Ion Rechargeable Battery Cell (29g Budget Grade) for DIY Projects

18650 3.7V 2000mAh Lithium-Ion Rechargeable Battery Cell (29g Budget Grade) for DIY Projects

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ComponentSpecification
ChemistryLithium-Ion (Li-ion)
Model18650 (Cylindrical)
Nominal Voltage3.7V
Full Charge Voltage4.2V
Capacity2000mAh (Rated)
Weight29 Grams (Lightweight/Budget Grade)
Terminal TypeFlat Top
Price
₹ 38.14 ₹ 38.14
(Tax included)

Product Description The 18650 3.7V 2000mAh Lithium-Ion Battery is an entry-level rechargeable cell designed for cost-sensitive electronic projects. Weighing in at 29 grams, this lightweight cell is ideal for applications where weight reduction is prioritized over extreme energy density. It serves as an excellent power source for low-to-medium drain devices such as portable fans, small LED emergency lights, and basic DIY toy robots. Its standard 18650 form factor ensures compatibility with a vast range of battery holders and TP4056-based charging modules.

Key Features

  • Lightweight Build: At 29g, it is significantly lighter than industrial-grade cells, making it suitable for weight-critical prototypes.

  • Standard 3.7V Rail: Provides the necessary voltage for most 3.3V and 5V (via boost) development boards.

  • Cost-Effective: A budget-friendly choice for students and hobbyists building their first battery-powered circuits.

  • Flat Top Terminals: Designed for easy insertion into spring-loaded battery compartments or for DIY soldering.

  • Universal 18650 Size: Fits standard 18mm x 65mm battery mounts and brackets.


Technical Details

  • Dimensions: 65.0 mm (Height) x 18.2 mm (Diameter)

  • Standard Charge Current: 500mA to 1000mA (Recommended)

  • Operating Temperature: -10°C to +50°C

  • Self-Discharge Rate: ~3% per month

  • Casing Material: Steel with protective insulation wrap

Prototyping and Engineering Tips from Robogears

  • Understanding Weight vs. Capacity: In the battery industry, weight is often tied to the thickness of the internal materials. A 29g cell is a "budget grade" cell. While rated at 2000mAh, it is best suited for low-current applications (under 1A draw) to ensure the voltage doesn't sag prematurely.

  • Project Suitability: This battery is perfect for an Arduino-powered sensor node or a small Bluetooth speaker. It is not recommended for high-torque racing drones or heavy-duty power tools that require high-burst discharge currents.

  • Charging Safety: Always use a dedicated Li-ion charger with a 4.2V cutoff. Never leave Li-ion batteries charging unattended, especially budget-grade cells, to ensure safety during the final voltage saturation phase.

  • No Internal Protection: This is an "unprotected" cell. To prevent permanent damage, ensure your circuit does not discharge the battery below 3.0V. We highly recommend using a TP4056 module with built-in protection for all your DIY builds using this cell.

Package Includes

  • 1 x 18650 3.7V 2000mAh Li-ion Battery (29g)

Disclaimer Images are for reference; actual wrapper color or markings may vary by batch. Specifications subject to change by manufacturer. Do not short-circuit, crush, or expose to high temperatures.