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DWEII

Multi-Cell 2S 3S 4S Type-C to 8.4V 12.6V 16.8V Step-Up Boost LiPo Polymer Li-Ion Charger 7.4V 11.1V 14.8V 18650 Lithium Battery (2S-2A)

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, May 9
Order within 3 hours and 24 minutes
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Color: 2S 2A


Features

  • Input Type-C 5V
  • 3PCS 2S 2A Multi-Cell 2S Type-C To 8.4V Step-Up Boost LiPo Polymer Li-Ion Charger 7.4V 11.1V 14.8V 18650 Lithium Battery
  • Protection for Battery Voltage Being Low than Input and Short Battery Good adaptability to Input Supply with Limited Driving Capability
  • Battery Overvoltage Protection
  • Applications: PDA, MP3 Players, MP4 Players; Digital Cameras; Bluetooth Applications; Game Players; Notebook; li-on li-po Lithium Battery 18650; Mobile phone; Solar charging; Audio equipment; Portable Devices; POS , Electric Fan;

Description

Description:2-Cell(2S) 8.4V Version:Input voltage : DC 3-6V(Recommend DC 3.7V 5V)Input current : 1A(1A Version);2A(2A Version);4A(4A Version)Charging voltage : 8.4VCharging current : 0.55A(1A Version);1.1A(2A Version);2.2A(4A Version)3-Cell(3S) 12.6V Version:Input voltage : DC 3-6V(Recommend DC 3.7V 5V)Input current : 1A(1A Version);2A(2A Version);4A(4A Version)Charging voltage : 12.6VCharging current : 0.37A(1A Version);0.74A(2A Version);1.48A(4A Version)4-Cell(4S) 16.8V Version:Input voltage : DC 3-6V(Recommend DC 3.7V 5V)Input current : 1A(1A Version);2A(2A Version);4A(4A Version)Charging voltage : 16.8VCharging current : 0.28A(1A Version);0.56A(2A Version);1.12A(4A Version)

Brand: DWEII


Color: 2S 2A


Item Weight: 0.01 Kilograms


Output Voltage: 8.4 Volts (DC)


Specification Met: FCC, RoHS


Package Dimensions: 3.23 x 2.68 x 0.55 inches


Item Weight: 0.317 ounces


Date First Available: January 6, 2023


Manufacturer: DWEII


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If you place your order now, the estimated arrival date for this product is: Saturday, May 9

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Top Amazon Reviews

    • No hassle voltage pump from USB C
Color: 4S 4A
Review Image by neithernet neithernet
Simple to use and working well.
Reviewed in the United States on January 3, 2026 by neithernet neithernet
    • Overheats doesn't work. Is hooked up properly
Color: 3S 4A
Get to about 200c with just 1a if charging 12v 3s battery. Also is 15v output when not connected to the battery which means the battery is going to charge up to about 15 volts which again is over voltage for basically every lithium ion battery.
Reviewed in the United States on January 7, 2026 by rick
    • Works fine.
Color: 4S 2A
Mine were 4s lithium ion. Perfect solution. Weirdly needed a correct wire. If it doesn’t work try a different wire and block. No idea.
Reviewed in the United States on March 11, 2025 by Chris and Debbie
    • As Alex H. explained, this can't be used with "real" USB-C power adapters
Color: 3S 4A
Alex H. is right. You can only use this device with dumb 5V USB power. Basically, it will work with USB-A to USB-C charging cable that comes with some devices. If you connect it to a real USB-C power adapter (like one from a laptop, MacBook, or other high-power demand devices), you will get no power -- for the reasons Alex H. mentions. This is the 4 amp 3S version that appears to draw far too many amps from a typical USB-A power supply for it to be able to charge 3S 18650 cells. I will try the 1 amp 3S version to see whether the lower amperage will keep my USB-A power adapter from overloading. [UPDATE: The 1 amp 3S version worked fine for recharging three 18650 cells in series (3S). It isn't fast charging by any means -- it took about 12 hours to charge the cells -- but it stopped charging at the correct voltage level. The 1 amp version got a little warm, but not worryingly so. Now that I'm getting over the disappointment that these devices don't work with "real" USB-C voltage auto-detecting power supplies, I'm finding them adequate for the price. I really wanted something that would negotiate a higher voltage, but apparently, this feature isn't available anywhere for dedicated charging modules yet.] - ... show more
Reviewed in the United States on June 27, 2023 by Jeff G
    • Awesome product!!!!
Color: 4S 4A
They work great and arrived very fast, and are exactly as advertised!!!
Reviewed in the United States on May 4, 2024 by Michael
    • Do not buy
Color: 3S 4A
Absolute trash. Heats up to unsafe levels and shuts down, I actually received a burn from this product.
Reviewed in the United States on September 15, 2025 by Michael Lewis
    • Works....but not well.
Color: 3S 4A
I have a love/hate relationship with this product. First, it should not be offered in a 4A model. Can it output 4.2v 4A from a 5V supply.....technically yes. But that inductor get SO incredibly hot that there's not way it's going to last for any reasonable length of time without active cooling. At most, I wouldn't use these for more than 2A. Maybe in China it's easy to find a non PD (power delivery) USB-C adapter that can output more than 2.4A but those don't really exist as a quality product. The best I've been able to find is 5V 3A which isn't a normal standard for USB. Sustaining 4A from a 2.4A supply with only .8V of drop is a recipe for trouble. But I feel like you would need a 5V 5A USB-C (non QC or PD) adapter to make that work well. Ideally, they'd put a PD controller on this, charge $5 more and then you'd have a product that is actually useful. TL:DR; buy the 1A or 2A and stay away from the 4A. Use the best and highest amperage 5V only charger you can get. ... show more
Reviewed in the United States on August 31, 2023 by Stephen
    • Very useful
Color: 4S 2A
Very small and useful
Reviewed in the United States on December 24, 2024 by Kindle Customer

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