21700 Vape Battery – Buy High-Quality Batteries in the UK

The 21700 vape battery is a reliable choice for vapers who need long-lasting power and consistent performance. With a larger capacity than standard 18650 batteries, it provides extended vaping time, making it ideal for high-wattage devices. Whether you’re a regular vaper or someone who enjoys longer sessions, choosing a quality 21700 battery ensures your device runs safely and efficiently.

If you're searching for the best 21700 vape battery in the UK, we stock trusted brands known for their performance and durability. Our range includes high-capacity options to suit different vaping needs, so you can find the perfect battery for your setup. Plus, with fast UK delivery, getting a new battery has never been easier.

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    21700 Battery

    1137037 Fogstar Energy FS4000 21700 4000mAh Battery

    Fogstar Energy FS4000 21700 4000mAh Battery

    Fogstar Energy FS4000 21700 Battery – 4000mAh capacity with a 25A continuous discharge rate. High-performance power for advanced vaping devices.

    £6.99

      FAQs

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      What’s the difference between a 21700 and 18650 vape battery?
      The main difference is size and capacity. A 21700 battery is slightly larger and can hold more charge than an 18650, which means longer vaping sessions without needing to recharge. It's perfect for high-powered devices or vapers who want more time between charges.

      Are 21700 batteries safe to use in all vape devices?
      Not all vape devices support 21700 batteries, so it’s important to check your mod’s compatibility first. If your device is designed for 21700s, they’re completely safe to use - just make sure you're using quality batteries from trusted brands and following proper charging and storage guidelines.