Description
Experience the ultimate in battery technology with the Efest IMR 21700 3700mAh 35A Flat Top Battery. This high-performance rechargeable battery boasts a remarkable 3700mAh capacity, providing long-lasting power and reliability for a variety of applications including power tools, high-end flashlights, and electronic mods. With a maximum continuous discharge rate of 35A, this battery ensures safety and efficiency, making it an ideal choice for high-demand electronics and custom battery packs.
- Exceptional Capacity:Features a substantial 3700mAh capacity, delivering extended runtime for devices, minimizing the need for frequent recharges.
- High Discharge Rate: Offers a powerful 35A max continuous discharge rate, perfect for high-performance devices that require a substantial power supply.
- Versatile Use: Ideal for a wide range of applications including power tools, thanks to its robust build and flat top design.
- Safety Features: Unprotected to provide the highest performance while maintaining safety with a cut-off voltage of 2.5V, protecting devices from over-discharge.
- Durable and Reliable: Built to last with a maximum voltage of 4.2V ± 0.05V and designed to withstand rigorous use in various electronic configurations.
SPECIFICATIONS
| Manufacturer: | EFest |
| Model: | IMR21700V1 |
| Size: | 21700 |
| Positive Terminal: | Flat Top |
| Nominal Capacity: | 3700mAh |
| Maximum Voltage: | 4.2V |
| Continuous Discharge Rating (max): | 10A |
| Nominal Voltage: | 3.7V |
| Cut-off Voltage: | 2.5V |
| Protected: | NO, UNPORTECTED |
| Rechargeable: | Yes |
| Approx. Dimensions: | 21.5mm x 70.4mm |
| Approx. Weight: | 73.12g |
| Country of Origin: | China |
| Associated Names: | |
| Data Specification Sheet: |
⚠ 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.