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18500 3.7V Battery 1900mAh, Li-ion Rechargeable for High Power Flashlight
Product Details:
| Place of Origin: | China |
| Model Number: | 18500 1900mAh 3.7V |
Payment & Shipping Terms:
| Minimum Order Quantity: | 1000PCS |
|---|---|
| Packaging Details: | Industrial Pakcage |
| Delivery Time: | 35 working days |
| Payment Terms: | L/C,T/T,Western Union |
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Detail Information |
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| Name: | Rechargeable Flashlight Battery | Voltage: | 3.7V |
|---|---|---|---|
| Capacity: | 1900mAh | Standard Charge Current: | 0.5C (950 MA) |
| Max. Charge Current: | 1.0C (1900 MA) | Discharge Cut-off Voltage: | 2.75 V |
| Internal Resistance: | ≤ 80 MΩ | Cycle Life: | 500 Cycles |
Product Description
18500 3.7V Battery 1900mAh, Li-ion Rechargeable for High Power Flashlight
Features
- Compact High-Capacity Design: The 18500 form factor provides a balanced combination of substantial capacity (1900mAh) and a more compact length compared to the common 18650, ideal for space-constrained devices.
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High Energy Density: Offers excellent energy-to-volume ratio, enabling longer runtimes for portable applications.
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Stable Voltage Output: Provides a relatively flat discharge curve for consistent device performance.
Specifications
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Voltage |
3.7V |
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Nominal Capacity |
1900mAh |
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Iedance |
<80 mΩ |
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Discharge cut-off voltage |
2.75 V |
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Max. Charge Current |
1.0C (1900 mA) |
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Standard charge current |
0.5C (950 mA) |
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Standard Charge Voltage |
4.20 V ± 0.05 V |
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Working teerature |
Charge:0°C to 45°C |
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Discharge:-10°C to 60°C |
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Storage teerature |
-20°C to 25°C |
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Cycle life |
500 cycles |
Applications
- High-Performance Flashlights & Portable Lighting: Many high-end LED flashlights and work lights are designed for 18500 cells.
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Portable Electronics: Certain handheld scanners, measurement tools, and older digital cameras.
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DIY & Hobbyist Projects: Robotics, custom portable power banks, and other electronic projects.
Warnings & Precautions
Charging
- Use a Dedicated Li-ion Charger: ALWAYS use a Li-ion specific charger designed for 4.2V cells and the CC/CV method. Using an incompatible charger (e.g., for Ni-MH) is extremely dangerous.
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Terminate Charging Correctly: The charger must accurately terminate at 4.20V. Do not leave batteries charging unattended for extended periods or overnight.
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Charge in a Safe Area: Charge on a non-flammable surface in a well-ventilated area, away from flammable materials and direct sunlight.
Discharging
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Prevent Over-Discharge: Never discharge the cell below the 2.75V cut-off voltage. Deep discharge causes irreversible damage and is a safety hazard. Devices should have proper low-voltage protection.
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Avoid Extreme Loads: Do not exceed the specified maximum continuous discharge current. Continuous over-current operation leads to overheating and reduced lifespan.
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Temperature Management: If the battery becomes excessively hot (e.g., >60°C) during use, stop the operation immediately and allow it to cool.
Storage & Handling
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Correct Storage State: For long-term storage (>1 month), charge the battery to 30%-50% capacity and store in a cool, dry place.
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Prevent Short Circuits: This is critical. Always transport or store individual cells in protective plastic cases. Never carry loose batteries where terminals can contact metal objects (keys, coins, other batteries).
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Inspect Before Use: Do not use if the wrapper is torn, the cell is swollen, dented, leaking, or shows any signs of damage.