Efest 18650 2500mAh Battery


Price:
Sale price$6.99


✔ Grade A Cells
✔ Guaranteed Authentic
✔ Free Battery Case Included
✔ Trusted Supplier Since 2014
✔ Free Shipping on U.S. Orders $50+

Pickup currently unavailable at Houston Warehouse

Key Features

  • Strong 2500mAh capacity for dependable runtime
  • High 20A output for demanding electronic devices
  • Flat top design fits standard 18650 configurations
  • IMR lithium-ion chemistry for stable performance
  • Compact size ideal for portable power solutions

Overview

The Efest IMR18650V1 delivers a dependable balance of capacity and power in a compact 18650 format. Rated at 2500mAh with a robust 20A continuous discharge, this flat top lithium-ion battery is designed for applications that require consistent output and efficient energy delivery. Its stable IMR chemistry supports reliable performance across a wide range of electronic systems.

Applications / Uses

  • High-performance flashlights
  • Portable electronics and accessories
  • Battery-powered tools
  • Power storage and backup systems
  • Custom electronic projects

SPECIFICATIONS

Manufacturer: Efest
Model: IMR18650V1
Battery Size: 18650
Positive Terminal: Flat Top
Nominal Capacity: 2500mAh
Continuous Discharge Rating: 20A
Nominal Voltage: 3.7V
Maximum Voltage: 4.2V
Cut-off Voltage: 2.5V
Protected: No, unprotected
Rechargeable: Yes
Approx. Dimensions: 18.42mm x 65.1mm
Approx. Weight: 44.4g
Efest 18650 2500mAh Battery

⚠ 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 or box.
  • 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 use in devices such as e-cigarettes or vaporizers.
  • What is Thermal Runaway?
    • A dangerous chain reaction where heat generated by a failing battery causes it to overheat further, potentially leading to fire or explosion.
    • Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
    • Prevention: Use a smart charger, avoid physical damage, and store batteries in a cool, dry place.
  • Storage & Transport: Always store batteries in protective cases or boxes 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. These are signs of internal damage or instability, and continued use could result in failure, fire, or explosion.
  • Charging: Use a smart charger designed specifically for lithium-ion batteries and ensure that the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
  • Prohibited Activities: Do not short circuit, modify, puncture, crush, expose to liquids, or solder directly onto the battery (spot weld only).
  • Emergency Response: If the battery shows signs of thermal runaway (e.g., smoke, swelling, or heat), immediately stop use and move it to a non-flammable surface (e.g., concrete or sand). For fires, use a Class D fire extinguisher or sand—never use water.

Disclaimer

IMR Batteries 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 product warnings and safety guidelines are effectively communicated to their customers. Some cells are sold in bulk packaging and are not individually packaged. Resellers must provide appropriate packaging for each individual cell sold and must not distribute cells loose, unprotected, or without a proper storage box or case.

Product compatibility is the sole responsibility of the customer. IMR Batteries does not guarantee compatibility with any specific device or application. We are not responsible for the design, assembly, performance, or safety of any battery pack constructed using our cells. It is the customer’s responsibility to ensure proper cell matching, protection circuitry, configuration, and safe construction practices. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.

You may also like

Recently viewed