Doublepow Battery UK11 Dual Slot USB Charger for Lithium Batteries: Dual slot charging
Meet the Smart Dual Slot USB Charger—your go-to gadget for juicing up two 18650 or 21700 lithium batteries at the same time without breaking a sweat. Thanks to its USB power input, you can plug it into just about anything (yes, even that ancient laptop you refuse to part with) to keep your batteries charged and ready for action. It’s smart, too, with a voltage output that dances between 3.7V and 4.2V, making it a perfect match for a variety of lithium batteries. Plus, it’s so compact and light, you’ll forget it’s in your bag until you need it—whether you’re at home or on the move.
Here’s the lowdown on what makes it tick:
- Double the fun—charge two batteries at once, because who has time to wait?
- USB powered means you’re not tied down to one power source. Freedom!
- LED indicators keep you in the loop, so you’re not left guessing if it’s done.
- And, because we care, it’s got your back with protection against overcharging and those pesky short circuits.
Features
- USB powered
- Compatible with 18650/21700 batteries
- 3.7V/4.2V output
- Compact design
- Dual slot charging
General specs
- Brand: Doublepow Battery
- Model: UK11
- Seller: Joom
- ID: 67a9d4fb416d8901af10832e
- Compatibility: 18650, 21700
- Input: USB
- Output Voltage: 3.7V, 4.2V
- Charging Slots: 2
- First listed by seller: 5/23/25
If you are interested in more details, you can find full information on the seller's page.
View on seller's site
#publicidad
$12.43
Last price update: 11/15/25
Out of stock
Price History for seller Joom
| Date | Price |
|---|---|
| 11/15/25 | $12.43 |
| 5/23/25 | $9.13 |
Shipping options
Delivery to 
United States
United States
Unavailable
Comparison with similar products
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Doublepow Battery UK11 Dual slot charging
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| Brand | Doublepow Battery | POWEROWL | ISDT | Redmi | ||
| Model | UK11 | pd20w | FY1601 | 608PD | ||
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| Price | $12.43 | $35.14 | $29.99 | $39.99 | $12.99 | $29.99 |
| Seller | Joom | Gshopper | Amazon | Gshopper | Gshopper | Gshopper |
| Update | November 14, 2025 | July 25, 2024 | December 6, 2025 | July 25, 2024 | July 25, 2024 | July 25, 2024 |
Dual Slot USB Charger for Lithium Batteries
$12.43
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