Cheap and Easy Portable Charger

Introduction: Cheap and Easy Portable Charger

About: Hello Instructables, and I'm a regular kid in Florida that loves making things and learning about stuff. I've basically play a lot of pokemon and love Star Wars and building stuff for stopmotion lego movies!

I've been seeing these instructables about portable chargers and they've been with soldering or parts which I think is too much!
Parts needed: A USB connection able to cut with two wires held, some electric tape( I used aluminum type), lego is want or a different cover, 9v battery with the power cable thing , especially wire strippers



    • Metalworking Contest

      Metalworking Contest
    • Fix It! Contest

      Fix It! Contest
    • Water Contest

      Water Contest

    9 Discussions

    its ok to use a 9v but not straight to your device,there are alot of simple circuits you could build to convert the 9v to 5v

    ok so if i hook a 9 volt to the charger cord and hook it up will it short the phone because a normal charger only outputs 5 volts not 9 get back to me please

    If you say so about the battery burning up I'll see if the results change with other plans towards it, thanks for the info

    It's not for a phone.... I've used it for an mp3 player and it's worked just fine for me.

    This is a very bad bad idea , over charging a lithium batery can be dangerous. For one the battery may explode.

    There is a reason why everyone else do it a certain way. I have no experience with currents and what not... And even I know that you should not use 9 volts where you are supposed to use 5.


    Following this is a really bad idea. This is almost twice as much voltage as your device was intended for. You need to decrease this to 5v as others have said. A very easy way to do that is with a Buck Converter.

    isn't 9v too much for cellphones?
    thought it was closer to 5v?

    1 reply

    I agree, the USB standard is 5V. You should really at a minimum use a 5V voltage regulator. If you don't, 9V can slowly, or quickly kill your device.

    If this charger has worked fine for you so far, that will be because 9V batteries can only output a small current and therefore not instantly blow up your device.

    If you continue to charge it with a 9V battery, you may have complications such as your device dying, getting hot, setting on fire, or the battery life being diminished from not being charged properly.