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DWEII

3PCS 18650 Lithium Battery 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 （2S-4A）

  • Based on 37 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Dec 20
Order within 6 hours and 47 minutes
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Color: 2S 4A


Features

  • Input Type-C 5V
  • 3PCS 2S 4A 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

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 BatteryDescription:1: Diverse choices, customers can choose what they need according to different needs2: Widely used3: High safety performance4: Simple and easy to understand and operate5: Battery overvoltage protectionParameter: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)Feature:Switching Frequency up to 1MHzQuasi-CV mode to Compensate for the Voltage Loss on Battery Internal Resistance and Trace ResistanceAutomatic RechargeProtection for Battery Voltage Being Low than Input and Short BatteryGood adaptability to Input Supply with Limited Driving CapabilityBattery Overvoltage ProtectionLed indicator : ''CR'' LED is charge status indicator''OK'' LED is fully charged OR Constant voltage mode;Operating Ambient Temperature－40℃ to ＋85℃Size 39mm x 18mm x 6.3mmWeight : 5g

Brand: DWEII


Color: 2S 4A


Product Dimensions: 14"D x 2"W x 7"H


Item Weight: 5 Grams


Output Voltage: 8.4 Volts


Product Dimensions: 14 x 2 x 7 inches


Item Weight: 0.176 ounces


Date First Available: January 6, 2023


Manufacturer: DWEII


Country of Origin: China


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Dec 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • 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
    • 18V out, not 5v as advertised
Color: 4S 4A
Review Image by Brian Brian
Glad I hooked up a voltmeter to the output. Unit reports 18V on the battery circuit on all 3 boards I received. Test before you hook up your battery. I can still use this for other batteries but not my 4.2v, which is entirely why I bought it.
Reviewed in the United States on November 8, 2024 by Brian Brian
    • 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
    • Very useful
Color: 4S 2A
Very small and useful
Reviewed in the United States on December 24, 2024 by Kindle Customer
    • 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
    • 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
    • It causes USB charger to reset
Color: 3S 4A
I have this wired to my 3s battery pack, and everytime I tried to charge my battery pack, it would cause my USB charger to cut off and restart. It did work for a brief second but will stop working all together.
Reviewed in the United States on November 12, 2024 by Khai Nguyen
    • Only works with basic 5v usb ports
Color: 2S 2A
The charger works with basic 5v usb ports where there is always power. Basically it is expecting a direct DC input. It does not work with any smart chargers that do USB PD. Since this device cannot negotiate a USB PDO it won't turn on. Also worth noting that it gets quite hot while charging. Still works as advertised, just be aware of the limitation mentioned above. ... show more
Reviewed in the United States on May 17, 2023 by Alex

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