Power Your Cell Phone Off Just About Any Battery.




Ever had your cell phone battery die and have no outlet around to provide any juice? Here's the solution!

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Step 1: Get the Parts

You'll need the following:

Step 2: Assembly

Cut one of the jumper cables in half and strip both ends, also take 2 pieces of wire and strip them too.

solder half of the jumper cable onto the first pin "Vin" (refer to package for pinout)
solder the other half of the jumper cable and a piece of wire to the "gnd" pin
solder the other piece of wire to the "Vout" terminal

Use the small bolt to attach the heatsync to the nte1904

Step 3: Test It Out

hook your contraption to a battery of at least 4v and meter the output

Step 4: Hook It Up

Step 5: Your Done!

If it works, then solder it onto either some clips or the device you want to power.

here are some examples of what you can use it for

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    7 Discussions

    jimmy dean

    10 years ago on Introduction

    I recommend throwing one 220uf capacitor between Vin and Gnd and another between Vout and Gnd


    11 years ago on Introduction

    Good hack in a pinch :) I have a cell phone missing the charger - I just hook up 6V from a power supply directly to the charging connector and away it goes. An alternative that doesn't require a power regulator by using the one on board :)

    5 replies

    Reply 11 years ago on Introduction

    charging my phone requires some crazy crap for my phone...something about pin x and a 165k ohm resistor


    Reply 11 years ago on Introduction

    Moto phones are weird that way. I found that you can just get a cheep off brand car charger at a gas station (or ebay) and it has the necessary resisters in the plug just chop off the car end, connect it to 5 volts and it charges right up.


    Moto phones are weird that way.

    I'm not convinced that's accurate - the phone I've been charging directly is a Motorola. It might not apply to the Razr, but it surely isn't under the blanket classification of weird moto. I've also charged Nokia phones that used to have super special requirements for charging - despite the screen saying "unauthorized charger" the phone still charges (it just doesn't indicate progress).

    Now, just make this run off of a 12V battery, and we've got a product for the developing world.


    sorry i should have been a bit more specific the ones with mini usb ports generally wont charge without a special resistor in the connector


    Reply 11 years ago on Introduction

    i can make it run off a 12v, or a 9v or a 5v or an 18v,etc. Using this same piece of hardware(though, the chip broke off of the board)