18650 Fenix Battery (4000 mAh)

Product Description: The Fenix ARB-L18-4000 is a rechargeable 18650 lithium-ion battery with a nominal capacity of 4000 mAh, designed for powerful LED flashlights and other high-drain devices. The battery ensures stable operation during peak loads, has virtually no memory effect, and is suitable for prolonged intensive use.

Manufacturer: Fenix. Category: Power Solutions > Rechargeable Batteries.

Purpose and Features

The battery is designed for use in powerful flashlights, portable devices, and equipment requiring high output current. The ARB-L18-4000 model is optimized to provide long-lasting autonomous operation with minimal capacity loss over multiple charge/discharge cycles.

Technical Specifications

• Type: Lithium-ion (Li-ion)
• Size: 18650
• Capacity: 4000 mAh
• Nominal Voltage: 3.6 V
• Maximum Output Current: 7 A
• Recommended Charging Current: 2 A (not exceeding 4 A)
• Cycle Life: Approximately 500 discharge/charge cycles with ≥70% retention of initial capacity
• Dimensions: 69.2 × 18.75 mm
• Weight: 55 g

Protection and Safety

• Built-in multi-stage protection circuit against overheating, overcharge, overdischarge, and short circuit
• Special ventilation holes for releasing accumulated gas
• Impact-resistant casing enhances reliability during transport and operation

Environmental and Operational Advantages

• No mercury or lead — a more environmentally safe alternative
• Virtually no memory effect, allowing the battery to be charged at any time without performance loss

Warranty: 12 months from the manufacturer.

This battery is ideal for users who value high capacity, reliability, and enhanced protection for intensive use. The Fenix ARB-L18-4000 combines modern lithium-ion technology, well-designed protective solutions, and high technical performance, making it an excellent choice for professional and everyday use.

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