Power your device longer with the Fogstar Energy 4000 18650 Battery. Featuring a high-capacity 4,000 mAh in a compact 18650 format with a solid 10 A continuous discharge, this flat-top, unprotected cell is ideal for everyday vaping and moderate-duty electronic devices. 

Key Features

• Generous 4 000 mAh Capacity – Extends runtime between charges for longer usage.
• 10 A Discharge Rating – Reliable performance for low-to-mid power devices. 
• Compact 18650 Size (Flat-Top) – Compatible with most standard mods and flashlights.
• Fogstar Quality Assurance – Manufactured by a trusted UK brand with a reputation for performance and reliability. 

Technical Specifications

Brand	Fogstar Energy
Model	FS4000
Format	18650 Flat-Top, Unprotected
Capacity	4,000 mAh
Nominal Voltage	3.6 V
Max Voltage	4.2 V
Continuous Discharge	10 A

Safety First

⚠ Important: This cell is unprotected. Always use with a quality charger and protective casing. Inspect wraps regularly—replace or rewrap if damaged. Never carry loose in your pocket or bag. 

Recommended Accessories

• Nitecore D4 Battery Charger – Safe charging for 18650 and other Li-Ion cells
• 18650 Protective Battery Case – Safeguard your cells during transport and storage
• Fogstar Energy 4000 21700 Battery – Alternate high-capacity cell with higher discharge rating

Why Choose Fogstar Energy 4000?

• Perfect for vapers needing long-lasting battery life without extreme power output.
• Reliable performance for everyday mods, flashlights, and devices.
• Premium Fogstar build ensures consistent performance you can trust.