Samsung 50S 3.7 V 5000mAh 21700 Battery 21700-5C
The Samsung INR21700-50S is a high-performance lithium-ion battery designed for applications requiring both high capacity and elevated discharge capability
- High-Capacity Cell: 5000mAh nominal capacity optimized for energy-dense battery pack designs.
- High Continuous Discharge: Supports 25A continuous discharge, with up to 45A when managed with an 80°C temperature cutoff.
- Flat Top Configuration: Unprotected flat top design suitable for engineered battery assemblies. Wide Operating Temperature Range: Reliable operation from -20°C to 60°C.
- BIS Certified: Certified for use in India, meeting applicable regulatory requirements.
Product Details
Discharge Rate
It provides steady, reliable power. Its voltage remains above 3.4V through 80% discharge, and sustains 90%+ capacity even under 5.0C high-rate discharge.
Cycle Life
Retains over 95% initial capacity after 800–1000 charge cycles. Excellent cycle durability delivers stable performance for long-service-life equipment.
Self-Discharge
Low self-discharge loss; over 92% capacity retained after 28 days storage at room temperature, ideal for long-term storage and backup devices.
Temp Performance
Wide discharge temperature of -20℃ to 60℃, great for e-bikes, power tools and outdoor energy storage in harsh conditions.
Battery Capacity Testing
Each 5000mAh lithium cell passes independent capacity detection. Standard charge and discharge tests check actual capacity to keep output consistent and reliable.
Battery Capacity Testing
100% full capacity testing for every single cell. Strict cycle capacity calibration screens defective cells, ensuring true rated capacity without virtual label.
Applications
Product Specifications
| Manufacturer | Samsung SDI |
| Model | INR21700-50S (50S) |
| Size | 21.1mm x 70.7mm |
| Positive Terminal | Flat Top |
| Nominal Capacity | 5000mAh |
| Continuous Discharge Rating (Max) | 25A (45A with 80°C cutoff) |
| Nominal Voltage | 3.6V |
| Maximum Voltage | 4.2V |
| Discharge Cut-off Voltage | 2.5V |
| Protected | No (Unprotected) |
| Rechargeable | Yes |
| Approx. Weight | 70.09g |
3.7 V 5000mAh Lithium Ion Battery Application
High-power two-wheel transportation/modified power equipment
Our cells perfectly fit e-bikes, motorcycles and cargo tricycles. They sustain steady high-current output during climbing and speeding. Low heat and no power loss even under long heavy-load riding.
Outdoor energy storage & emergency backup power supply system
High-capacity storage with strong load capacity, supporting instant high-power output for home appliances, outdoor gear and RV electronics.
Model aircraft & unmanned aerial vehicles & water power equipment
Takeoff, hover and high-speed flight demand instant peak current and outstanding burst power & discharge consistency. After series-parallel assembly, cells offer linear, lag-free power output for professional aerial devices.
Special outdoor and low-temperature exploration equipment
Stable discharge performance down to -20℃. Works reliably in cold and complicated field environments. Ideal power cell for outdoor survey and special exploration gear.
Intelligent Robots & Mobility Devices
Robots and transport gear face frequent start-stops and fluctuating loads. Our cells deliver smooth discharge with wide rate adaptability. They cope with variable current and guarantee jerk-free running.
High-power lithium battery tools for industry and gardens
Industrial tools often generate sudden heavy current surges during operation. Our cells feature low internal resistance to resist high-current shocks. They stay cool and maintain stable power under long intensive workloads.
Recreational racing power equipment
Racing gear balances top speed, burst power and runtime. Our cells combine large capacity and strong peak discharge to outperform ordinary cells in both speed and endurance.
The Complete Guide For 3.7 V 5000mAh Lithium Ion Battery
A 3.7 V 5000mAh lithium-ion battery serves as a crucial power source for various electronic devices. This guide delves into its components, functionalities, and best practices for optimal use.
Part 1. Critical Warning
Never carry loose batteries in your pocket, purse, or bag. Loose batteries can come into contact with metal objects like keys or coins, causing a short circuit, which may result in severe burns, fire, or explosion. Always store or transport batteries in a protective case or box.Part 2. Intended Use
This battery is designed for integration into protected battery packs with a Battery Management System (BMS) or Protection Circuit Board (PCB). It is not intended for standalone use or use in devices such as e-cigarettes or vaporizers.Part 3. Storage & Transport
Always store batteries in protective cases or boxes to prevent accidental contact with metal objects. Never store loose batteries in pockets, purses, bags, or near conductive materials.Part 4. Inspection
Do not use if the PVC wrapper, terminal insulator, or casing is damaged, dented, leaking, or bulging. These are signs of internal damage or instability, and continued use could result in failure, fire, or explosion.Part 5. Charging
Use a smart charger designed specifically for lithium-ion batteries and ensure that the charger’s voltage matches the battery’s specifications. Never overcharge, over-discharge, or leave unattended while charging.Part 6. Prohibited Activities
Do not short circuit, modify, puncture, crush, expose to liquids, or solder directly onto the battery (spot weld only).Part 7. Emergency Response
If a cell shows signs of thermal runaway (smoke, swelling, hissing, or heat), stop use immediately and, if it can be done safely, move it to a non-flammable surface (e.g., concrete or sand) away from combustibles. Lithium-ion cell fires are Class B fires — use an ABC/dry-chemical extinguisher, or douse with large amounts of water to cool the cell and prevent spread. Do not rely on a small spray; thorough cooling is required, and cells can reignite from residual heat, so monitor the area afterward. (Class D extinguishers are for lithium-metal batteries, not lithium-ion.) For any fire beyond a single small cell, evacuate and call emergency services.
FAQs
Which renewable energy storage-related products do you mainly deal in?
We have a complete range of products covering the entire energy storage industry chain,
including lithium iron phosphate battery cells for energy storage, finished lithium battery packs, household wall-mounted energy storage batteries, stackable commercial and industrial energy storage units, and off-grid energy storage systems for wind and solar power,which are suitable for energy storage scenarios of renewable energy such as photovoltaic and wind power.
Does the product support customization in terms of specifications, appearance and communication protocols?
Can battery cells be assembled into energy storage batteries by themselves? Is there any supporting plan?
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