Make your USB cable to charge your mobile

Posted by tech master  |  at  7:32 PM No comments

You're a road warrior - complete with laptop, but your cell phone is running
out of power. You need it on, but there's not a power outlet in sight. What do
you do? In the post -K750i era, most phones will charge off their USB cables,
but fret not if you have an older phone- if you've got a charger and USB cable
to spare, you can make your own in 15 minutes! The method works with most phones
that have 3.6 volt Li-ion battery, but still may not work with some, so make
sure it's a spare charger that you're using.

(1). Know thy USB

The two extremes (pins 4 and 1 from left to right) are the ones we're after-
they're the negative and the positive terminals for USB power respectively. Pins
2 and 3 are for data.

(2). Hack 'EM up

Use a wire cutter or just a blade to cut and open up both the charger and USB
cable. The red and black wires in the USB cable are what we're concerned
with-the white and green are for data, so don't bother with those. Your charger
should have red and black wires too. In the given image one wire is of USB cable and other is of charger.

(3). Making Ends Meet

You've probably guessed this now-join the two red wires and the two black
wires. If  you have access to one, use a soldering iron and secure the
connections using solder. This will keep it intact even if you use it a bit
roughly. Insulate them from each other using electrical tape (extremely
important), and you're done!

(4). Testing...

Voila! It works! the next time you have a battery emergency, just
leech power off your laptop and make that all important call!.