Description
Efest 18650 4000mAh 10A Battery – High-Capacity Lithium-Ion Power Cell
Overview
The Efest 18650 4000mAh 10A Battery is a high-capacity lithium-ion rechargeable power cell, designed for efficient and long-lasting energy delivery. With a 4000mAh capacity and a continuous discharge rate of 10A, this battery is ideal for low-to-moderate-drain applications, ensuring stable power output and extended runtime.
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.
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 |
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.
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.
⚠ 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. 🔋