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SMAKN DC 5V/4A 20W Switching Power Supply Adapter 100-240 Ac(US)

4.6 out of 5 stars 647 ratings

$10.99
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Purchase options and add-ons

Brand SMAKN
Connectivity Technology DC Barrel
Connector Type 2.5mm
Compatible Devices adapter
Included Components Adapter
Special Feature Fast Charging
Color Black
Input Voltage 240 Volts
Mounting Type Wall Mount
Amperage 4 Amps

About this item

  • Compatible with most devices that use a 5V 4A or lower amperage
  • 2.5mm x 5.5mm (Inner diameter x Outer diameter) with inside positive polarity
  • Input: 100-240V~0.6A, 50/60Hz / Output: 5V 4000mA 20W Max

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SMAKN DC 5V/4A 20W Switching Power Supply Adapter 100-240 Ac(US)
SMAKN DC 5V/4A 20W Switching Power Supply Adapter 100-240 Ac(US)
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What's in the box

  • Adapter
  • Product Description

    Compatible with most devices that use a 5V 4A or lower amperage 2.5mm x 5.5mm (Inner diameter x Outer diameter) with inside positive polarity Input: 100-240V~0.6A, 50/60Hz / Output: 5V 4000mA 20W Max

    Product information

    Package Dimensions 5.71 x 4.09 x 2.17 inches
    Item Weight 5 ounces
    ASIN B01N4HYWAM
    Item model number 4330194421
    Customer Reviews
    4.6 out of 5 stars 647 ratings

    4.6 out of 5 stars
    Is Discontinued By Manufacturer No
    Date First Available December 27, 2016
    Manufacturer SMAKN

    Warranty & Support

    Product Warranty: For warranty information about this product, please click here

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    SMAKN DC 5V/4A 20W Switching Power Supply Adapter 100-240 Ac(US)


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    Customer reviews

    4.6 out of 5 stars
    647 global ratings

    Review this product

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    Customers say

    Customers find the power adapter works well with Jetson and Raspberry Pi devices, praising its sturdy build quality and functionality. They consider it good value for money. However, several customers note that the cable length is too short.

    34 customers mention "Power supply"27 positive7 negative

    Customers find the power adapter works well, particularly with Jetson and Raspberry Pi devices.

    "...This one supplies 3amp, which provides a comfortable margin for highly upgraded/modified machines." Read more

    "...It's a power supply. It appears to supply enough power for my Jetson Nano...." Read more

    "...Now the Nano operates in full power mode." Read more

    "WeBoost Cell Signal booster stopped working. Original power supply had stopped working...." Read more

    21 customers mention "Functionality"15 positive6 negative

    Customers find that the power adapter works well.

    "...Original power supply had stopped working. The replacement unit works perfectly at a much better price than branded one...." Read more

    "Value for money. So far working quite well...." Read more

    "...a power indicator on a connected appliance, but will cause erratic operation, or failure entirely...." Read more

    "I used this power adapter for my Jetson Nano and it works well. Now I don't need to use up the micro USB slot with a power supply." Read more

    7 customers mention "Build quality"7 positive0 negative

    Customers appreciate the power adapter's build quality, describing it as sturdy, with one customer noting it handles whatever load the Pi throws at it.

    "Works perfectly for the my Jetson nano. No low voltage indicator. Sturdy build...." Read more

    "Used this to power an atomic pi SBC. Seems to be a good stable supply. Great value for the money" Read more

    "Great connection and durable. Plus 6 ft long. Great deal for the price." Read more

    "I use it for my Atomic Pi. Handles whatever load the Pi throws it when I add peripheral equipment." Read more

    7 customers mention "Value for money"7 positive0 negative

    Customers find the power adapter to be good value for money.

    "...Thanks for the fair priced power supply that got my booster working again!" Read more

    "Value for money. So far working quite well...." Read more

    "...Seems to be a good stable supply. Great value for the money" Read more

    "Great connection and durable. Plus 6 ft long. Great deal for the price." Read more

    4 customers mention "Cable length"0 positive4 negative

    Customers express dissatisfaction with the charging adapter's cable length, finding it far too short.

    "...No low voltage indicator. Sturdy build. The cord is a bit on the short end, but it’s reasonably probably all that people will need anyway." Read more

    "...But be warned, the cable is far too short. It can barely reach from the outlet under my desk up to the computer." Read more

    "Works well. Very short cable." Read more

    "...Also, what is up with a 1m cable? Ridiculously short. Waste of time to buy and return this crap." Read more

    Slim 5V 4A that works with the Atomic Pi
    5 out of 5 stars
    Slim 5V 4A that works with the Atomic Pi
    Steps taken to get it to work with the Atomic Pi with the minimal supplies I had on hand are as follows, 1. cut the cable from an old charger I no longer used 2. strip one side of the cable 3/4 of an inch. strip the other side 1.5 inches. (do this for both positive and negative wires) 3. tin the shorter 3/4 inch side of the cable. fold the 1.5 inch side in half to double the thickness of the cable and tin. 4. the marked area on the power supply in the picture will tell you the polarity of the cables. in this case inside tip is positive and outside is negative. - insert the 3/4" thinner wire into the Atomic Pi. Positive into pin 3. Negative into pin 4. After tinning you may need to use pliers to press the the wire in order to make it fit into the Atomic Pi header. - on the folded thicker side of the cable insert the positive wire into the DC plug tip. Negative around the outside of the plug. I used a twist tie to hold the outside negative wire around the barrel jack. I could try to form it around the barrel with pliers, but this is a temporary solution until I receive female 2.5 mm barrel jacks purchased elsewhere. In retrospect, folding and tinning the negative 1.5mm barrel jack wire may have been unnecessary, wrapping and taping the wire around the barrel jack may have been optimal.
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    Top reviews from the United States

    • Reviewed in the United States on May 25, 2019
      Steps taken to get it to work with the Atomic Pi with the minimal supplies I had on hand are as follows,

      1. cut the cable from an old charger I no longer used
      2. strip one side of the cable 3/4 of an inch. strip the other side 1.5 inches. (do this for both positive and negative wires)
      3. tin the shorter 3/4 inch side of the cable. fold the 1.5 inch side in half to double the thickness of the cable and tin.
      4. the marked area on the power supply in the picture will tell you the polarity of the cables. in this case inside tip is positive and outside is negative.
      - insert the 3/4" thinner wire into the Atomic Pi. Positive into pin 3. Negative into pin 4. After tinning you may need to use pliers to press the the wire in order to make it fit into the Atomic Pi header.
      - on the folded thicker side of the cable insert the positive wire into the DC plug tip. Negative around the outside of the plug.

      I used a twist tie to hold the outside negative wire around the barrel jack. I could try to form it around the barrel with pliers, but this is a temporary solution until I receive female 2.5 mm barrel jacks purchased elsewhere. In retrospect, folding and tinning the negative 1.5mm barrel jack wire may have been unnecessary, wrapping and taping the wire around the barrel jack may have been optimal.
      Customer image
      5.0 out of 5 stars
      Slim 5V 4A that works with the Atomic Pi

      Reviewed in the United States on May 25, 2019
      Steps taken to get it to work with the Atomic Pi with the minimal supplies I had on hand are as follows,

      1. cut the cable from an old charger I no longer used
      2. strip one side of the cable 3/4 of an inch. strip the other side 1.5 inches. (do this for both positive and negative wires)
      3. tin the shorter 3/4 inch side of the cable. fold the 1.5 inch side in half to double the thickness of the cable and tin.
      4. the marked area on the power supply in the picture will tell you the polarity of the cables. in this case inside tip is positive and outside is negative.
      - insert the 3/4" thinner wire into the Atomic Pi. Positive into pin 3. Negative into pin 4. After tinning you may need to use pliers to press the the wire in order to make it fit into the Atomic Pi header.
      - on the folded thicker side of the cable insert the positive wire into the DC plug tip. Negative around the outside of the plug.

      I used a twist tie to hold the outside negative wire around the barrel jack. I could try to form it around the barrel with pliers, but this is a temporary solution until I receive female 2.5 mm barrel jacks purchased elsewhere. In retrospect, folding and tinning the negative 1.5mm barrel jack wire may have been unnecessary, wrapping and taping the wire around the barrel jack may have been optimal.
      Images in this review
      Customer imageCustomer image
      8 people found this helpful
      Report
    • Reviewed in the United States on June 30, 2024
      After adding a five-pin DIn plug to the end of the cable, this is a perfect replacement supply for Atari 600xl, 800xl, 130xe, 65xe, 800xe, and XEGS computers. There are pre-made replacements from other vendors, but I like to make my own. This one supplies 3amp, which provides a comfortable margin for highly upgraded/modified machines.
    • Reviewed in the United States on December 28, 2019
      What can you say?

      It's a power supply. It appears to supply enough power for my Jetson Nano.

      Unfortunately the mains connector is hard-molded as a US type mains connection. If you want to take it overseas, it **will** work, but you will need an adapter for the type of mains plug you will be using.
    • Reviewed in the United States on July 17, 2019
      So it worked, that is as expected. The tubular connector is the large size as indicated, but I knew it was not the one I wanted, so what is an engineer to do? I whacked off the connector and ( a bit of solder and heat shrink later) I spliced in the one from the dead supply I had. It works! TaDa! ... Angels sing! Bright lights from my electronics devices cast LED flicker shadows!
      3 people found this helpful
      Report
    • Reviewed in the United States on September 23, 2019
      WeBoost Cell Signal booster stopped working. Original power supply had stopped working. The replacement unit works perfectly at a much better price than branded one. I wonder how many people return WeBoost or other devices when the power supply dies instead. Thanks for the fair priced power supply that got my booster working again!
      4 people found this helpful
      Report
    • Reviewed in the United States on May 19, 2019
      As the "Frequently Bought Together" section indicates, this is perfect for the Jetson Nano developer kit that just came out.

      However, if you're using this power adapter for that, be warned that you also need a jumper on so that the board uses external power rather than micro-USB.
      32 people found this helpful
      Report
    • Reviewed in the United States on January 30, 2021
      5 volts, 4 amps, and the right size plug and polarity for a Jetson Nano 4GB. Now the Nano operates in full power mode.
    • Reviewed in the United States on May 9, 2020
      Works perfectly for the my Jetson nano. No low voltage indicator. Sturdy build. The cord is a bit on the short end, but it’s reasonably probably all that people will need anyway.