Ucell 4,000mAh 40A 21700 Battery

Here are high-quality performances and a 4,000mAh capacity with this 21700 battery from the French manufacturer Ucell!

Sold individually, this battery is packaged in a protective plastic tube.

The 21700 battery by Ucell

With its 4,000mAh capacity and a 30A discharge (40A in pulse), this battery is perfectly suited to both electronic and mechanical mods.

With this 4,000mAh, 30A 21700 battery from Ucell, enjoy tight or extremely airy sub-ohm vaping. Its stable Lithium-Ion chemistry (INR) can stand anything!

Technical specifications

• Chemistry: INR Lithium-Ion
• Capacity: 4,000mAh
• Continuous discharge current: 30A
• Maximum discharge current: 40A
• Voltage: 3.7V
• Length: +/-70mm
• Diameter: +/- 21mm
• EC norm

A few safety rules

To enjoy safe use of your 21700 battery from Ucell, follow these few safety rules:

1. Always carry your battery in a plastic case (non-conductor material)
2. Don't expose your battery to direct sunlight
3. Do not use your battery if damaged. Put it aside and check if you can fix it with a wrap
4. Always check the battery slot before inserting your battery, especially for the presence of e-liquid
5. Use a dedicated external charger (sold separately) to charge your battery; this way, you'll preserve the durability of your battery

The 4,000mAh, 30A 21700 battery is manufactured in France by Ucell.