Samsung INR21700-50S 5000mAh 21700 Battery (High Drain)
Samsung INR21700-50S 5000mAh 21700 Battery (High Drain)
Samsung INR21700-50S 5000mAh 21700 Lithium-Ion Battery Cell
High Power Meets High Capacity
The Samsung INR21700-50S is one of the most popular high-performance 21700 lithium-ion battery cells available today. Combining a substantial 5000mAh capacity with up to 25A continuous discharge capability, the 50S delivers an exceptional balance of runtime and power output.
Manufactured by Samsung SDI, this cell is widely trusted by battery pack builders, electric mobility manufacturers, robotics developers, and energy storage professionals who require reliable performance under demanding conditions.
Whether you're building a high-performance e-bike battery, FPV drone pack, portable power station, or custom lithium battery system, the Samsung 50S provides the power and endurance needed for modern applications.
Why Choose the Samsung 50S?
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5000mAh typical capacity
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High 25A continuous discharge capability
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Excellent balance of power and runtime
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Low internal resistance
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Consistent voltage under load
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Trusted Samsung SDI manufacturing
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Ideal for demanding battery pack applications
Ideal Applications
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E-bike battery packs
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Electric scooters and mobility systems
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FPV drones and UAV platforms
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Robotics and automation systems
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Portable power stations
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Solar energy storage projects
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High-performance battery packs
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Power tools and industrial equipment
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Samsung SDI |
| Model | INR21700-50S |
| Format | 21700 |
| Chemistry | Lithium-Ion |
| Nominal Voltage | 3.6V |
| Charge Voltage | 4.2V |
| Capacity | 5000mAh Typical |
| Max Continuous Discharge | 25A |
| Standard Charge Current | 2.5A |
| Maximum Charge Current | 5A |
| Weight | Approximately 70g |
| Diameter | 21.5mm Max |
| Height | 70.0mm Max |
| Internal Resistance | ≤20–25 mΩ |
| Origin | South Korea |
ULS Performance Testing
At United Lithium Solutions, we do more than sell battery cells—we test them.
The Samsung 50S has been evaluated by our team to measure:
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Capacity performance
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Voltage stability under load
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High-discharge capability
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Thermal performance
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Real-world battery pack suitability
Our testing helps customers make informed decisions using real performance data rather than relying solely on manufacturer specifications.
Quality Assurance
Every Samsung 50S cell supplied by United Lithium Solutions is inspected before shipment.
Each cell undergoes:
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Visual inspection
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Voltage verification
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Authenticity screening
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Secure packaging for transportation
Safety Notice
This is an unprotected lithium-ion battery cell intended for use within properly designed battery packs that incorporate appropriate protection circuitry and battery management systems.
Improper handling, charging, storage, or installation may result in fire, injury, or property damage. Users should have experience working with lithium-ion battery systems before use.