Description
Efest 18650 4000mAh 10A Battery – High-Capacity Lithium-Ion Power Cell
The Efest 18650 4000mAh 10A battery is a reliable, high-capacity lithium-ion rechargeable cell designed for devices that demand steady power and extended usage. With a generous 4000mAh capacity and a 10A continuous discharge rate, it's well-suited for low-to-medium-drain electronics such as flashlights, portable fans, and other everyday tech. Its durable build and efficient energy output make it a go-to option for dependable performance over repeated charge cycles.
Key Features:
- High Capacity: 4000mAh of stored energy extends usage time, reducing the need for frequent recharges.
- Moderate Discharge Rate: Delivers a 10A continuous discharge, ideal for devices with low to moderate power requirements.
- Stable Lithium-Ion Chemistry: Offers consistent voltage and safe energy delivery across various devices.
- Rechargeable & Long-Lasting: Built to endure numerous charge cycles with minimal capacity loss over time.
- Standard 18650 Size: Compatible with a wide range of electronics that accept 18650-format batteries.
SPECIFICATIONS
| Manufacturer: | Efest |
| Model: | 18650 4000mAh 10A |
| Size: | 18650 |
| Positive Terminal: | Flat Top |
| Nominal Capacity: | 4000mAh |
| Nominal Voltage: | 3.7V |
| Full Charge Voltage: | 4.2V | Continuous Discharge Rating (max): | 10A |
| Protected: | NO |
| Rechargeable: | Yes |
| Cycle Life: | 300+ Charge Cycles |
| Approx. Dimensions: | 18.3mm x 65.0mm |
| Approx. Weight: | 48g |
| Country of Origin: | China |
⚠ Important Safety Warnings
Improper handling or misuse of this lithium-ion battery can result in FIRE, EXPLOSION, or THERMAL RUNAWAY, causing personal injury, property damage, or death. Users must read and follow all safety guidelines before purchase and use. Click here to review the full safety guidelines.
- 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.
- 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 for e-cigarettes, vaporizers, or similar devices.
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Thermal Runaway: A chain reaction where heat from a failing battery
causes further overheating, potentially leading to fire or explosion.
- Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
- Prevention: Use a smart charger, avoid damage, and store batteries in a cool, dry place.
- Storage & Transport: Always store batteries in protective cases to prevent accidental contact with metal objects. Never store loose batteries in pockets, purses, bags, or near conductive materials.
- Inspection: Do not use if the PVC wrapper, terminal insulator, or casing is damaged, dented, leaking, or bulging. Continued use could result in failure, fire, or explosion.
- Charging: Use a smart charger specifically designed for lithium-ion batteries and ensure the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
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Prohibited Activities:
- Do not expose the battery to extreme heat, fire, or liquids.
- Do not short circuit, puncture, crush, or modify the battery.
- Do not charge or discharge beyond the manufacturer’s voltage range.
- Do not dispose of in regular trash—always recycle at approved facilities.
- Emergency Response: If the battery overheats, emits smoke, or swells, move it to a non-flammable surface (e.g., sand or concrete) and stop use immediately. In case of fire, use a Class D fire extinguisher or sand. Do not use water.
Disclaimer
18650Battery.com is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Lithium-ion batteries require strict adherence to all safety protocols. It is the reseller's responsibility to ensure all safety warnings and product guidelines are effectively communicated to customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.