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Fogstar Energy 4000 21700 Battery – 4 Ah, 40 A

Regular price £6.99 | Save £-6.99 (Liquid error (sections/product-template line 182): divided by 0% off)
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Fogstar Energy 4000 21700 Battery – 4 Ah, 40 A

1 x Fogstar Energy 4000 21700 Battery - £6.99
  • 1 x Fogstar Energy 4000 21700 Battery - £6.99
  • 2 x Fogstar Energy 4000 21700 Batteries - £13.49
  • 3 x Fogstar Energy 4000 21700 Batteries - £19.49
  • 4 x Fogstar Energy 4000 21700 Batteries - £23.99

PRODUCT DETAILS

Power longer and stronger with the Fogstar Energy 4000 21700 Battery. Offering an impressive 4,000 mAh capacity and a robust 40 A continuous discharge rating, this flat-top, unprotected cell is ideal for high-drain vaping devices and custom battery packs. 

Key Features

  • 4,000 mAh Capacity – Run your device longer between charges.
  • 40 A Discharge – Supports high-wattage builds and demanding setups. 
  • Flat-Top 21700 Format – Fits the latest mods and mechanical setups.
  • Fogstar Build Quality – Manufactured for reliability and safe performance. 

Technical Specifications

Brand Fogstar Energy
Model FS4000
Type 21700 Flat-Top, Unprotected
Capacity 4,000 mAh
Nominal Voltage 3.6 V
Max Voltage 4.2 V
Continuous Discharge 40 A

Safety Notice

Important: This cell is unprotected—use only in devices or packs with proper battery management systems (BMS). Store in a protective case and inspect wraps regularly for damage. Always charge with a dedicated Li-ion charger. 

Recommended Accessories

Why Fogstar Energy 4000?

  • Exceptional mix of power and capacity for cloud chasers and high-performance users.
  • Compact 21700 design and high amperage rating make it device-friendly and future-proof.
  • Trusted Fogstar reliability ensures consistent and safe usage. 

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