Efest INR 18650 4000mAh Lithium Battery

Efest 18650 4000mAh 10A Battery – High-Capacity Lithium-Ion Power Cell

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  Key Features

  ✅ High Capacity: 4000mAh provides longer usage time before needing a recharge.
  ✅ Moderate Discharge Rate: 10A continuous discharge, suitable for low-to-medium-drain devices.
  ✅ Lithium-Ion Chemistry: Ensures efficient, stable, and reliable power delivery.
  ✅ Rechargeable & Durable: Supports multiple charge cycles with minimal performance degradation.
  ✅ Compact 18650 Size: Universally compatible with a wide range of electronic devices.

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  Specifications

  Specification	Details
  Brand	Efest
  Model	18650 4000mAh 10A
  Battery Type	18650
  Capacity	4000mAh
  Nominal Voltage	3.7V
  Full Charge Voltage	4.2V
  Discharge Cutoff Voltage	2.5V
  Continuous Discharge Rate (CDR)	10A
  Rechargeable	Yes
  Protected	No (Unprotected cell – use with proper safety measures)
  Cycle Life	~300+ charge cycles
  Diameter	18.3mm
  Length	65.0mm
  Weight	~48g

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  Applications

  The Efest 18650 4000mAh 10A is widely used in low-to-moderate-drain electronic devices, including:
  🔋 Flashlights & LED Devices – Ideal for high-efficiency LED torches requiring long runtime.
  🔋 Battery Packs – Commonly used in custom-built power storage solutions.
  🔋 Consumer Electronics – Suitable for laptops, wireless devices, and other household electronics.
  🔋 Portable Power Banks – Provides stable energy output for power banks and small backup systems.
  🔋 Medical Equipment – Used in low-drain medical devices requiring consistent performance.

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  Safety Guidelines & Warnings

  ⚠️ IMPORTANT SAFETY NOTICE ⚠️
  Lithium-ion batteries require proper handling and knowledge to ensure safe operation. Failure to follow safety guidelines may result in fire, explosion, serious injury, or property damage.

  General Safety Guidelines

  ✔ Only purchase and use if you fully understand lithium-ion battery safety.
  ✔ Always charge in or on a fire-resistant surface—never leave batteries charging unattended.
  ✔ Use only a compatible smart charger designed specifically for this type of battery.
  ✔ Store batteries in a protective case—never carry them loose in a pocket, bag, or purse.
  ✔ Keep away from metal objects (keys, coins, tools) to prevent short circuits.
  ✔ Use only within manufacturer-listed specifications and in protected battery packs.
  ✔ Resellers must provide these warnings to all customers.

  🚫 Prohibited Uses & Handling

  ⛔ DO NOT use this battery in e-cigarettes, vaporizers, or similar devices.
  ⛔ DO NOT mix old and new, or used and unused batteries.
  ⛔ DO NOT short circuit, puncture, cut, crush, incinerate, or modify the battery.
  ⛔ DO NOT use if the battery wrapper is torn or damaged in any way.
  ⛔ DO NOT overcharge or over-discharge—this can lead to battery failure.
  ⛔ DO NOT expose the battery to liquids, extreme heat, or direct sunlight.
  ⛔ DO NOT solder directly—only use spot welding for battery pack assembly.

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  ⚠ User Responsibility & Risk Acknowledgment

  • The user assumes full responsibility for proper handling, charging, and storage.
  • Misuse or mishandling may result in serious injury or damage.
  • No guarantee of compatibility with any specific device is provided.
  • Usage of this battery is at your own risk.

  By purchasing and using the Efest 18650 4000mAh 10A Battery, you acknowledge and agree to follow all safety guidelines. Failure to comply may result in hazardous consequences. Prior knowledge of lithium-ion battery safety is required before purchase.

  Stay safe and handle responsibly. 🔋