21700 Battery Guide
A 21700 battery is a high-capacity rechargeable lithium-ion cell commonly used in advanced vaping devices. The numbers indicate its size: 21mm diameter and 70mm length. These batteries offer superior battery life and power output compared to smaller alternatives.
What are the different types of 21700 batteries available?
We offer several variations of high-quality 21700 batteries to suit different vaping needs:
3000mAh: Perfect for moderate power usage
4000mAh: Ideal for extended vaping sessions
4200mAh: Maximum capacity for longest battery life
30-35 Amp: For high-wattage devices and powerful mods
The mAh (milliamp hours) indicates battery capacity, while the amp rating determines the maximum safe power output.
How do I choose the right 21700 battery for my device?
Vaping Style
Lower wattage (under 60W): Focus on higher mAh
Higher wattage (60W+): Prioritize amp rating
Compatibility
Always ensure your device is specifically designed for 21700 batteries
How do 21700 batteries compare to other vaping batteries?
| Battery Type | Capacity Range | Best For |
|---|---|---|
| 21700 | 3000-4200mAh | High power, long life |
| 18650 | 2500-3000mAh | Compact devices |
| 20700 | 3000-3500mAh | Mid-range power |
21700 batteries generally provide the best balance of size, power, and battery life for modern vaping devices.
Safety Precautions
- Only use in devices specifically designed for 21700 batteries
- Purchase from reputable sellers (like MIST)
- Always match batteries in pairs when using a dual-battery device
- Check your device's minimum amp requirement
- Never exceed the battery's amp rating
- Store and transport in proper battery cases
- Must be 18+ to purchase in accordance with UK regulations
- Always use a proper vape battery charger
