Instructables

Easy How to charge a cellphone battery from other cellphone

ok here is the problem:

Imagine that you have 2 celular phones, you know they have different chargers, suddenly your favorite celular phone charger
explodes, dissapear or even if you connect your charger to your favorite phone, the phone says is not charging your battery is diying! and you NEED to use your fav phone because it haves the photos, videos etc that you want to share or is just that
YOU NEED TO USE YOUR FAV PHONE IN THAT MOMENT AND YOU CANT BUY A NEW PHONE CHARGER AT THAT MOMENT
or maybe you just want to charge a  3.6 volt batteries from disposed celularphones.

here is how:

you will need:

2 cell phones
1 working cell charger
1 rubber band
1 male header pin with 3 pins



 
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Step 1:

Picture of
As you can see in the photo you have 5 volts of energy directly from the charger connector, you cant use that volt power because your cellphone batteries works with 3.6 volts.

Also you cant use the charger directly because cellphone companies loves to make you buy a special cellphone chargers with weird connectors.

Step 2:

Ok lets get started:

Open both cellphones and remove the batteries, check that both batteries haves the same voltage, in this case 3.6 v, also check the polarity of each battery, double check the polarity of both batteries with a multimeter IS VERY IMPORTANT!

Step 3:

Now connect your charger to the cellphone, look for the power pins, if you got the polarity from the batteries, you can guess what pin is the negative and what is the positive,but anyway DOUBLE CHECK WITH A MULTIMETER is very very important, because if you put the batteries with the wrong polarity they can explode! in this case the positive pin is in the left, the center pin is for communication to protect the battery. and the right pin is the ground or negative.
¿Estas en México?
Usas Telcel?
animes25 (author)  brunodiaz209 months ago
sip
do all cell phone batteries have the same voltage generally?
animes25 (author)  amandaghassaei1 year ago
I think that most new cellphones haves the same voltage, more if they have a usb cable