Description
Efest 21700 6000mAh 3.7V Battery – Ultra-High Capacity for Extended Performance
The Efest 21700 6000mAh battery is a powerful lithium-ion rechargeable cell built for long-lasting performance. With an impressive 6000mAh capacity and a 10A max continuous discharge rate, this unprotected flat-top battery is ideal for low-to-moderate-drain devices that require high capacity and consistent output. Whether you're powering flashlights, battery packs, or other compatible electronics, the Efest 21700 delivers dependable energy with each charge.
Key Features:
- Massive 6000mAh Capacity: Provides extended runtime, reducing the frequency of recharges in high-capacity devices.
- 10A Continuous Discharge: Supports stable output for medium-drain applications that need consistent performance.
- Flat-Top Design: Offers greater compatibility with a wide range of 21700-compatible devices and packs.
- Rechargeable & Cost-Efficient: Designed for repeated use, helping reduce waste and save on long-term energy costs.
- Rugged and Reliable: Built to industry standards with a durable form factor—measuring 21.5mm x 70.9mm and weighing 74g.
SPECIFICATIONS
| Manufacturer: | Efest |
| Size: | 21700 |
| Positive Terminal: | Flat Top |
| Nominal Capacity: | 6,000mAh |
| Nominal Voltage: | 3.7V |
| Full Charge Voltage: | 4.2V | Continuous Discharge Rating (max): | 10A |
| Protected: | NO |
| Rechargeable: | Yes |
| Approx. Dimensions: | 70.9mm x 21.5mm |
| Approx. Weight: | 74g |
| 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.