Samsung SDI INR21700-50E Li-Ion 4900mAh 9.8A Battery — an industrial lithium-ion cell in 21700 form factor from Samsung, designed for professional applications with increased power requirements. This module combines a large capacity of 4900 mAh and a stable continuous discharge current of 9.8 A (2 C), making it an ideal choice for battery packs, power sources for drones, quadcopters, and other technical solutions where reliability and long-term operation are important.

Specifications

• Manufacturer: Samsung
• Type: Li-ion
• Chemical composition: INR (lithium-manganese-nickel)
• Capacity: 4900 mAh
• Nominal voltage: 3.6 V
• Maximum charging voltage: 4.2 V
• Cut-off voltage: 2.5 V
• Configuration: 1S1P
• Discharge current: 2 C (9.8 A continuous)
• Charging current: 0.5 C (2.5 A standard, up to 6 A for fast charging)
• Casing: rigid
• Dimensions: 21.22 x 21.22 x 70.3 mm
• Weight: 68.9 g

Package contents

• 1 x Samsung SDI INR21700-50E battery

What else you need to buy

• 1 x cell holder
• 1 x spot welding machine (if battery assembly is required)
• 1 x spot welding strip

Safety and maintenance

The cells are manufactured to industrial standards and are equipped with an internal safety valve that disconnects the cell in case of increased internal pressure or overheating. It is important to remember that these batteries are not intended for direct installation in consumer electronics without proper assembly, a protection board (BMS/PCM), and correct mechanical fixation. For integration into battery modules, it is recommended to use spot welding, follow safe charging and operating rules, and use protective elements and controllers.

The INR21700-50E model from Samsung is characterized by high energy density for the 21700 form factor, which allows for reducing the dimensions of battery packs while maintaining a significant capacity of 4900 mAh. The continuous discharge current of 9.8 A makes this cell suitable for drone power sources, backup power systems, portable energy modules, and specialized industrial projects. Dimensions of 21.22 x 21.22 x 70.3 mm and a weight of 68.9 g allow the cell to be easily integrated into compact assemblies, and the rigid casing provides mechanical protection during installation.

Before use, it is recommended to plan the battery management and protection system, select compatible holders and materials for spot welding. For fast charging, a current of up to 6 A is allowed, provided temperature control and protection are applied. Follow the manufacturer's recommendations regarding a charging voltage of 4.2 V and a minimum operating voltage of 2.5 V to ensure longevity and safe operation.

This battery is designed for those who need a reliable, high-capacity, and durable power source for professional solutions. It combines Samsung quality, proven INR-chemistry technologies, and practical operating parameters required for modern energy applications.

Other products in this category can be found here Drone Batteries