18650 4000mah 3.7V Rechargeable Lithium Ion battery More 800 Life Cycles
Features
1. Stable Discharge Performance: Features a stable nominal voltage of 3.7V, ensuring consistent
power delivery throughout the discharge cycle .
2. Long cycle life: more than 800 Cycles while retaining more than 80% of its initial capacity.
3. High Energy Density: Ultra high energy density, light weight,stable working voltage.
4. Low Self-Discharge: Maintains its charge for extended periods when not in use, making it ideal for infrequently used devices.
5. No Memory Effect: Can be recharged at any state of charge without suffering from capacity reduction.
6. MSDS UN38.3 DG License support overseas delivery via sea air or courier.
Specifications
| Rated Capacity | 4000mAh |
| Nominal Voltage | 3.7V |
| Charge Cut-off Voltage | 4.2V |
| Discharge Cut Off Voltage | 2.75V |
| Standard Charge Current | 1500mA |
| Max. Discharging Current | 12.5A (with 60°C temperature cut-off) |
| Cycle Life | 800 times |
| Discharge Rate | ≤2% |
| Dimensions (L*W*H) | 18*65mm ±5mm |
| Weight | 48g |
| Operating Teerature | Charging: 0 ~ 45℃/ Discharging:-20 ~ 60℃ |
| Storage Teerature | -10 ~ 45℃ |
Applications
- Portable Electronics: High-power flashlights (torches) , LED lights, laser pointers.
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Power Banks and USB Chargers: Commonly used in DIY or commercial mobile power banks .
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Consumer Electronics: Laptop battery packs , digital cameras, cordless phones, portable audio equipment.
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Electric Tools and Equipment: Power tools , garden tools, drones (often requiring high-drain variants) .
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Medical Equipment: Certain portable medical devices .
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Other: Emergency lighting, alarm systems, electronic locks , and various DIY projects.
Usage precations and safety warnings
WARNING: Improper use of lithium-ion batteries can lead to fire, explosion, or serious injury. Always follow these guidelines.
Charging
- Use a Dedicated Charger: Always use a charger specifically designed for lithium-ion batteries with the correct voltage (4.2V) and current limits.
- Charge Within Specifications: Do not charge above the maximum voltage of 4.2V or exceed the maximum charge current specified for the battery.
- Temperature Monitoring: Charge only between 0°C to 45°C. Never charge a battery that is below freezing (0°C) or feels hot to the touch.
Discharging
- Avoid Over-Discharge: Stop using the battery before the device's cut-off voltage. Over-discharging can cause irreversible internal damage .
- Current Limits: Do not exceed the maximum continuous discharge current specified for the battery model. Exceeding this limit can cause overheating and damage .
- Temperature Management: Avoid discharging outside the recommended temperature range (-20°C to 60°C). Extreme temperatures reduce performance and can be hazardous .
Storage
- Partial Charge Storage: For long-term storage (longer than one month), store the battery at a 30%-50% State of Charge (SOC).
- Cool and Dry Environment: Store in a cool, dry place away from direct sunlight. Ideal storage temperature is between -20°C to 25°C .
- Isolation: Store batteries separately in non-conductive containers to prevent short circuits and contact with metal objects.
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