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Pricelist: Retail Price (B2C) Pricelist
18650 3.7V 2600mAh Lithium-Ion Rechargeable Battery Cell (44g Grade A) for Robotics and Power Banks

18650 3.7V 2600mAh Lithium-Ion Rechargeable Battery Cell (44g Grade A) for Robotics and Power Banks

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ParameterDetailed Specification
Cell TypeLithium-ion (Li-ion)
Form Factor18650
Nominal Voltage3.7V
Capacity2600 mAh
Weight44 Grams (±1g)
Charging Voltage4.2V
Discharge Cut-off2.5V–2.75V
Max Discharge CurrentOptimized for Standard & High-Drain applications
Price
₹ 135.59 ₹ 135.59
(Tax included)

Product Description The 18650 3.7V 2600mAh Lithium-Ion Battery is a premium-grade, high-capacity cell designed for demanding electronic applications. At a verified weight of 44 grams, this cell represents a high-density "Grade A" build, ensuring that the 2600mAh capacity is genuine and capable of sustained discharge. These cells are the industry standard for building custom battery packs, powering high-torque robotic motors, and replacing depleted cells in laptop batteries or high-intensity LED flashlights. Its flat-top design makes it ideal for spot-welding into multi-cell configurations or fitting into standard spring-loaded 18650 holders.

Key Features

  • Verified Density: The 44g weight is a hallmark of high-quality internal chemistry and longer cycle life.

  • Consistent Voltage: Maintains a stable 3.7V nominal output, minimizing resets in microcontrollers during operation.

  • High Capacity: 2600mAh provides ample runtime for mobile robots and portable IoT devices.

  • Rechargeable Efficiency: Optimized for 300–500 charge cycles with minimal capacity degradation.

  • Industrial Standard: Flat-top terminals allow for easy DIY soldering (with care) or professional spot-welding.

Technical Details

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

  • Standard Charge Current: 1300mA (0.5C)

  • Max Continuous Discharge: 2C to 3C (Typical)

  • Operating Temperature: -20°C to +60°C

  • Self-Discharge Rate: < 1.5% per month

  • Chemistry Stability: Lithium Manganese Dioxide / Cobalt variants (Safe-to-use when managed)

Prototyping and Engineering Tips from Robogears

  • The Weight Test: In the world of 18650 cells, weight is the best indicator of quality. Cheaper "counterfeit" cells often weigh 30g or less; this 44g cell ensures you are getting the full advertised capacity for your robotics projects.

  • Building a 7.4V Pack: To power an Arduino through the DC jack, use two of these in series with a 2S BMS. This provides 7.4V nominal (8.4V full), which is the most efficient voltage for the Arduino’s onboard 5V regulator.

  • Soldering vs. Spot Welding: While spot welding is preferred, if you must solder to these cells, use a high-wattage iron (60W+) to make the connection in under 2 seconds. Excessive heat can damage the internal safety vent and the lithium chemistry.

  • Safety First: This is an "unprotected" cell. It does not have built-in circuitry to stop over-discharge. Ensure your project uses a BMS (Battery Management System) or a TP4056 with protection to prevent the voltage from dropping below 2.5V.

Package Includes

  • 1 x 18650 3.7V 2600mAh Li-ion Battery (44g)

Disclaimer Images are for reference; actual wrapper color or brand markings may vary by batch. Specifications subject to change by manufacturer. Do not short-circuit, crush, or incinerate. Use only dedicated Li-ion chargers.