Fogstar Energy Dark Blue 18650 Battery (4000mAh)

Fogstar FS4000 18650 Battery – 4000mAh, 10A

Introducing the Fogstar FS4000 18650 battery, from the UK’s trusted battery supplier. Designed for low-powered devices such as Mouth To Lung (MTL) kits, this flat-top lithium-ion cell delivers an impressive 4000mAh capacity with a 10A maximum discharge, providing long-lasting battery performance for extended vaping sessions. Please note: these batteries are not suitable for high-powered mods or sub-ohm devices.

Manufactured to high standards, Fogstar batteries ensure reliable performance and safety when used according to manufacturer specifications. Perfect for MTL vapers seeking consistent, long-lasting power.

Specifications

• Manufacturer: Fogstar
• Model: FS4000
• Size: 18650
• Capacity: 4000mAh
• Maximum Discharge: 10A
• Nominal Voltage: 3.6V
• Maximum Voltage: 4.2V
• Top: Flat-Top
• Protection: None

Safety & Usage Guidelines

• Never carry lithium-ion batteries in pockets, bags, or loose with metal objects—this can be extremely hazardous
• Charge only on dedicated lithium-ion chargers rated for 18650 cells
• Never leave batteries unattended while charging
• Keep batteries away from children and pets
• Inspect wraps and insulators regularly; repair or dispose of batteries with damaged wraps
• Batteries have a typical cycle life of 200–500 cycles, depending on usage
• Recycle batteries at end of life—do not crush, incinerate, or modify
• Use only within manufacturer’s specifications

What’s In The Box

• 1 x Fogstar FS4000 18650 Battery