The Fogstar Energy 18650 Dark Blue (FS4000) is a specialist high-capacity cell designed to maximise run-time for low-power vaping setups. Boasting a massive 4000mAh capacity, this battery offers significantly longer life between charges compared to standard 2500mAh or 3000mAh cells, making it an exceptional choice for Mouth-to-Lung (MTL) vapers who prioritise endurance over raw power.It is crucial to note that this battery has a Maximum Continuous Discharge Rating (CDR) of 10A. This makes it strictly suitable for low-wattage applications (typically under 20W in a single-battery device). It is not suitable for high-wattage sub-ohm vaping or cloud chasing setups, as exceeding the amp limit can be unsafe and will trigger low battery warnings on your device.However, for vapers using a box mod with a high-resistance MTL tank (such as a Nautilus or Zenith) at modest power settings, the Fogstar FS4000 delivers unparalleled longevity, allowing you to vape for days rather than hours. Supplied with a protective PVC case for safe transport.Additional Information• Only use according to the manufacturer’s instructions. • Lithium-Ion cells should be charged on a dedicated charger rated specifically for Lithium-Ion cells. • Never leave a battery unattended whilst charging. • Keep away from animals and children. • Wraps and insulators should be periodically inspected for tears or damage. If a battery has a damaged wrap, it should be repaired or disposed of immediately. • Batteries usually have a cycle life of between 200-500 cycles (this varies with manufacturer) before noticeable capacity drop-off. Batteries should be recycled at this time. • Do not crush, incinerate or modify.
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