How to Build a Phone Charger in 2 Minutes

Introduction: How to Build a Phone Charger in 2 Minutes

in this instructable, you will learn how to build a phone charger in no-time and almost no tools.

all you need is:


2 X 3V coin battery

old (working) phone charging cable

some kind of tape

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1:

first, about the charging cable, you need to cut it after the USB connection which will expose 4 wires. you need to cut the two that are responsible for the data transportation leaving only the black/blue and the red wire. then tape the black wire to the rough side of one battery,

Step 2:

now tape the smooth side of the second battery to the red wire of the cable

Step 3: You Are Done!

now tape the two batteries together, with their empty sides facing each other - rough side to smooth side. and that's it!

version 2.0 coming soon

Be the First to Share


    • Backyard Contest

      Backyard Contest
    • Silly Hats Speed Challenge

      Silly Hats Speed Challenge
    • Arduino Contest 2020

      Arduino Contest 2020

    2 Discussions

    DIY Hacks and How Tos

    Is this really able to charge the phone? It seems like the phone battery would have a higher capacity than the coin cells.


    Reply 2 years ago

    you are semi-right. it does only have a disappointing power of about 450mah but for checking your inbox or to call sombody once a while it does a pretty good job