21700 3.7V 5000mAh Lithium Ion Cell

The 21700 3.7V 5000mAh Lithium Ion Cell is a rechargeable cylindrical Li-Ion battery designed for a wide range of compatible electronic and electrical applications. Its 21700 form factor, 3.7V nominal voltage, and 5000mAh capacity make it suitable for DIY electronics, robotics, portable power projects, battery packs and other applications that require a rechargeable lithium-ion cell.

The 21700 battery format is larger than the commonly used 18650 format, providing a different physical size and capacity configuration. Before using this cell, always confirm that the battery dimensions, voltage requirements, charging method and discharge requirements are suitable for your application.

Key Features

• Battery Type: Lithium Ion / Li-Ion
• Cell Format: 21700
• Nominal Voltage: 3.7V
• Capacity: 5000mAh
• Rechargeable: Yes
• Cylindrical battery cell
• Suitable for compatible electronics and DIY projects
• Useful for robotics and portable power applications
• Suitable for compatible battery-pack designs

Technical Specifications

Important: Add the actual dimensions, maximum continuous discharge current, charging voltage, charging current, protection status, terminal type and weight to the product page if these specifications are confirmed by your supplier.

21700 vs 18650

The 21700 and 18650 are different cylindrical battery formats.

The 21700 format is approximately 21 mm in diameter and 70 mm long, while an 18650 cell is approximately 18 mm in diameter and 65 mm long.

They are not physically interchangeable unless the device or battery holder is specifically designed to accommodate both formats.

Always check the battery holder, enclosure and device specifications before purchasing.