Description
Samsung INR21700-50G (Version B) Lithium-ion Battery Cell
| Specification | Details |
|---|---|
| Model | INR21700-50G (Version B) |
| Type | Lithium-ion Rechargeable Cell |
| Nominal Capacity | 4900mAh (Standard Discharge at 0.2C) |
| Rated Capacity | 4750mAh (Discharge at 1C) |
| Nominal Voltage | 3.63V |
| Charging Voltage | 4.2V |
| Charging Method | CC-CV (Constant Current with Limited Voltage) |
| Standard Charge Current | 0.5C (2450mA) |
| Max. Charge Current | 1C (4900mA) |
| Max. Discharge Current | Continuous: 9.8A (2C), Pulse: 14.7A (3C, not continuous) |
| Discharge Cut-off Voltage | 2.5V |
| Cycle Life | ≥80% Capacity after 500 Cycles at 1C |
| Cell Weight | Maximum 72.5g |
| Cell Dimensions | Diameter: 21.5mm, Height: 70.85mm |
| Operating Temperature | Charging: 0°C to 45°C Discharging: -20°C to 60°C |
| Storage Conditions | 1 Year: -20°C to 23°C 3 Months: -20°C to 45°C 1 Month: -20°C to 60°C |
| Recovery Characteristics | Capacity ≥ 4410mAh (90% of standard capacity) after 20 days at 60°C |
Features
- High Energy Density: With a nominal capacity of 4900mAh, this cell is ideal for applications requiring extended runtime.
- Reliable Performance: Stable operation under various temperatures, ensuring versatility for different environments.
- Enhanced Cycle Life: Delivers 80% capacity even after 500 charge/discharge cycles.
- Safety Tested: Passed rigorous tests including drop, vibration, overcharge, short-circuit, and heating to ensure safety.
Applications
- Power tools
- E-bikes and scooters
- Energy storage systems (ESS)
- Uninterruptible power supplies (UPS)
- Custom battery pack builds
Safety Warning for Lithium-Ion Battery Usage
Customers should have a clear understanding of lithium-ion battery handling and safety before making a purchase. Lithium-ion batteries are highly sensitive and may pose fire, burn, or explosion risks if improperly handled. Always charge batteries on fire-resistant surfaces, and never leave them charging unattended.
By purchasing, you assume full responsibility for any injury, damage, or loss arising from the incorrect use or handling of lithium-ion batteries or chargers. Compatibility with specific devices is not guaranteed. Only charge using a smart charger designed specifically for this battery type, and do not mix old or used batteries with new ones.
Important Usage Guidelines:
- Not for Use in E-Cigarettes or Similar Devices: Lithium-ion batteries present a serious risk of injury, property damage, or even death if improperly used.
- Risk of Fire and Explosion: Misuse can cause batteries to ignite, explode, or release harmful gases.
- Always Use in a Protected Pack: Ensure batteries are used within intended specifications and supported by appropriate circuitry.
- Proper Storage and Handling: Store batteries in protective cases, away from metal items to prevent short circuits.
- Inspection Prior to Use: Do not use batteries with damaged wrappers, torn insulators, or visible damage.
- Follow Manufacturer's Charging Specifications: Avoid overcharging or over-discharging, and never alter, dismantle, puncture, crush, or burn.
- Heat and Water Precautions: Do not expose batteries to high temperatures or any liquids.
- Assembly Guidelines: Batteries should only be spot welded; do not solder directly onto battery terminals.
Users are expected to have battery-handling knowledge before purchasing. By using these batteries, you acknowledge that usage is solely at your own risk, and you take full responsibility for any resulting consequences.
For Resellers: Please ensure all safety information is passed along to end users to promote safe handling and proper use.