Lakerol USB Charger From Old Nokia Batteries




Hi all!
This is my version of the Portable USB Charger by "slipknot rules". Original found at

Check his page for schematics, partslist and some good discussion in the comments.

Check my pictures and the comments in them for what i learnt while doing my version...

Btw, if you have all the parts except the 7805 regulator you can find one in an Nintendo 8-bit. Thats how my project started... :-)

And of course I am not liable for any damage that may occur to your devices from using this project.
Li-ion batteries can be potentially dangerous. Handle them with care and NEVER short-circuit.

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    5 Discussions


    7 years ago on Introduction

    Here is an example of what happens when charging is done wrong...

    1 reply

    Reply 7 years ago on Introduction

    Which is from a good Adafruit tutorial explaining why this should not be done... :-)


    7 years ago on Introduction

    Looks like my test setup..

    Use a old metal baking tray, with your paper plate in that. It'll give you something to hold onto when you run it outside. Of course, it is conductive, so don't do that if you're using wall power. Putting a piece of plywood is also good, stops any heat and electricity.

    A baking sheet will also contain any water you dump on flame. I see you don't have anything in the photo, you should have something if you're concerned about fire, or work outside away from anything that can burn.

    2 replies

    Reply 7 years ago on Introduction

    Oh yeah, and keep a dry wooden stick with hooked end (like a wooden crowbar) on hand for pulling melting wall adapters out.


    Reply 7 years ago on Introduction

    Hahaha... Yeah good points... Thanks!
    I wasn't really worried about my setup but I was prepared with a fireblanket, extinguisher and gloves as the fireplace is just outside the picture and those are in my opinion always essential to have near...