DC-DC 4.5-40V To 5V 2A USB Charger Step down Converter Voltmeter Module

(6 customer reviews)

In stock

SKU: 43776
  1. Input voltage: DC 4.5 ~ 40V.
  2. Output voltage: 5V (when the input voltage is between 6.5V ~ 40V).
  3. Output current: 2A.
  4. The voltmeter has an automatic calibration function.
  5. With reverse connection protection.
  6. With overheat protection and short circuit protection.


(Including GST)

In stock

Select below products to add together

High Quality Ultra Flexible 18AWG Silicone Wire 3m (Black) + 3m (Red) ₹ 320.15

New Price: ₹ 191

Purchase this product now and earn 2 Robu Points!

Very Low Stock. Order Now !

Free Delivery above ₹499
Free Delivery
above ₹499
1 Year Warranty
15 Days Warranty
Cash On delivery
Cash on Delivery*

Didn’t find what you are looking for?

Category: Buck Converter
Tags: Power Supply, DC Power Supply, Voltage Regulator, Step Down Converter, Buck Converter, Multi Output Voltage, 5V Regulator, 2A Regulator

This is DC-DC 4.5-40V To 5V 2A USB Charger Step down Converter Voltmeter Module, a combo of 2A Charger and voltage checker.

The module converts input of 4.5-40V into a very stable 5V 2A output. The device features a USB port through which you can charge your phone. While charging your device please consider that the output of this device is regulated at 5V 2A.

Simply connect this device to the power supply, the voltage can be detected in real time. When you need the phone, IPAD, MP3 and other digital products to charge, click the “Output Enable” button, then USB power indicator lights up and it will start supplying 5V 2A at its output.

When you need to turn off the voltmeter, click the “Low Power” button, then enter the ultra-low-power standby mode, USB output corresponding shutdown.

It accepts wide input voltage as from car/battery car/motorcycle used for monitoring battery voltage; measure the voltage needed for a variety of occasions. The output current capability 5.0V/2A, enough to meet a variety of USB devices.


This module default D + D- short, most of the cell phone charger is compatible, and set aside a variety of mobile phones identification resistor installation location, if you need to add the identification resistor, please connect D + D- wires cut, then added.

Voltmeter Calibration Method

Step1: Press the “Output Enable” button  more than 2 seconds, release, voltmeter flashes, this time into the voltage regulation mode;

Step2: Press the “Output Enable” button (normal speed), the voltage value is adding up a unit; Press the “Low Power” button, minus a unit; Due to a unit is less than 0.1V, the minimum voltage display to 0.1V, so you need to continuously press 1-5 times to see the voltmeter change 0.1V, how many times voltmeter change 0.1V by pressing the button, depending on the current display voltage, the higher the voltage, the fewer the number of press.

Step3: press the “Output Enable” button for more than 2 seconds, release, to exit the voltage calibration mode. Data is not lost after the power failure.S-L1600

  1. Cars and Electric Bikes
  2. Motorcycle for voltage measurement and to charge the phone
  3. iPads, Mobile Phones
  4. Mp3 Devices

Features :

  1. The voltmeter has an automatic calibration function.
  2. With reverse connection protection.
  3. With overheat protection and short circuit protection.
  4. High efficiency and low ripple.
  5. With USB power indicator light.

Package Includes :

1 x DC-DC 4.5-40V To 5V 2A USB Charger.

Input Voltage (V)

4.5 to 40

Output Voltage(V)


Max. Output Current (A)


Length (mm):


Width (mm):


Height (mm):


Weight (g):


Shipping Weight 0.017 kg
Shipping Dimensions 7 × 2 × 2 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Based on 6 reviews

4.7 overall

Add a review

  1. Manpreet Singh (verified owner)

    Superb product

    Manpreet Singh

  2. kamleshkush (verified owner)

    Good quality product


  3. nharishankar (verified owner)

    Works very well. Using this to power my Raspberry Pi from a 14.8v Li-ion battery pack and works well. No heating issue so far.


  4. akshay.r.deshmukh (verified owner)

    It becomes very very hot when connected to LiPo battery (12V) and Mobile on the USB port


  5. anandan.selvaganesan (verified owner)

    input current (Ampere) adjustment if there will too Good


  6. Mustafa

    For private charging devii


Questions and answers of the customers

  1. 0 votes
  2. 0 votes

    Yes you can use it but you have to check the re... Read more

  3. 0 votes
    Q Q Can I use it for the Raspberry Pi 4 with an 11.1v 18650 battery pack? answer now
    Asked by ashutoshkvdlw123 on July 21, 2020 7:31 pm

    Yes you can use it, but I suggest to prefer the... Read more

Only registered users are eligible to enter questions
Country Of Origin: China

You may also like…