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The Essentials in 10 Seconds
- 21700 Format (US21700VTC6A): Larger size and better performance (21mm wide x 70mm tall).
- Real 4000mAh: Made to last a full day of sub-ohm vaping without problems.
- Maximum Continuous Discharge (with thermal cutoff): 40A. To safely and consistently achieve this peak power, the battery must have a monitoring system that cuts off the discharge if the cell temperature reaches 80°C.
- Maximum Continuous Discharge (without thermal cutoff): 30A. This is the recommended limit if there is no external temperature control, to prevent cell degradation or instability.
Sony VTC6A 21700: Bigger, Stronger, Unstoppable
Moving to the 21700 format allowed Sony to create a battery with no limits. The US21700VTC6A is an energy beast that can provide thick clouds and constant flavor hour after hour. It is the logical choice for vapers who use modern mods and don't want to change batteries all the time.
Performance Data
| Parameter | Technical Details |
|---|---|
| Model | Sony US21700VTC6A |
| Chemistry | Advanced IMR / Li-Ion |
| Nominal Capacity | 4000mAh |
| Dimensions (Format) | 21.1 mm diameter x 70 mm length |
| Maximum Continuous Discharge |
With thermal cutoff: 40A Without thermal cutoff: 30A |
| Charge Voltage | 4.20V |
| Positive Pole | Flat Top |
Questions and Answers
Will it fit in my current device?
Attention: Because it is a 21700 battery (21mm x 70mm), it will not fit in mods made only for smaller 18650 batteries. Please check that your device manual says it can use 21700 batteries.
Can I trust these 4000mAh?
Absolutely. As a 100% original unit, drain tests prove that its cells deliver a huge and constant capacity without failing, which is impossible with fake batteries.
Is its chemistry safe for vaping?
Of course. It uses the most stable IMR chemistry in the industry, avoiding dangerous gases and staying surprisingly cool under pressure.
How do you recommend charging such a large battery?
To charge a 4000mAh cell safely and keep all its charging cycles healthy, our top choice is an Xtar smart charger. Explore our Xtar chargers to find yours.
