Emergency Power Supply




Introduction: Emergency Power Supply

About: well.....i tinker around with just about anything once the creative juice start flowing

ok this is my first instructible so bear with me , i made this on such short notice because i needed a Power source to use on camping trips so i hope the time i spent on it helps somebody since i didnt have a box t put it in so I used Electrical tape

plus i also can use it when the power goes out i can use it to charge a Cell phone or run the light that i Have Taped on it

materials needed
Sealed Lead Acid Battery (From An Old Dead UPS I already Had, i think its a 7Ah But im not sure )

14-16 Ga Wire (Wally world)

cigarette lighter or Aux power outlet (Wally world)

12v Light (Bass Pro Shops $16.49 )

And A Switch (Harbor Freight $2.99) (NO LONGER CARRIED)

Heres One Simular from BASS PRO

Tools Needed:
Philips Screwdriver
Electrical Tape
Wire Stripper/crimper

Note: Use Common sense, make sure your connections are good I am NOT responsible for any Damages due to Shorts, reverse polarity (Fried Electronics in General)......................

And Im sorry that some of my pictures are poor thats because my camera's battery died and it would have taken too long to charge so i had to use my cellphone camera

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Step 1: Battery

Since I Already Had My Wiring Made ILL skip that step.
prep your battery
For wraping tape it works best if you turn the battery on the side that you wouldn't be using or have someone hold it for you.start with your aux outlet and switch. wire the Aux outlet directly to the battery then connect your wires to the switch for other opitional accessories like a Light or something

Step 2: Wiring

Well this one is self explanatory I've written a wiring diagram for it

Step 3: Finshing Up

With everything in place and taped on (temporary) test it with cell phone car charger
Then add an Inverter too

Future Improvements:
Put the Battery in A Box
Mount the AUX Socket,the switch &the light in/on the Box
Maybe A Solar Panel http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=41144
And Charge Controller http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=96728

Plus I didnt have to recycle the battery just the old dead UPS components

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    8 Discussions


    10 years ago on Step 3

    You could add one of the small (100 watt) 12 VDC to 110 VAC converters and power a small device...


    Reply 10 years ago on Introduction

    I have already have a 75 Watt /100 watt Peak inverter i use for my Laptop but i think this battery im using has a low amp hr. but since money was tight when i built this i couldnt buy another one


    Reply 7 years ago on Introduction

    the Converter which is an Inverter is pictured


    8 years ago on Step 3

    How do you re-charge the battery? I made one of these last night, and came to instructables looking for a charge circuit. Good build.

    I actually made 2, one with a single battery, and a second with two batteries wired in parallel. I have 50-60 of these batteries lying around (IT guy) and like the idea, I'm just trying to figure the best way to replenish the depleted batteries.


    Reply 8 years ago on Introduction

    i used a 12v battery charger from bass pro.....


    Reply 9 years ago on Introduction

    if im using my inverter with a load, about 10 to 15 mins
    but if i use the LED Light, about 3-4 hrs
    and a 12v cell phone charger, about 30 to 45 mins


    Reply 9 years ago on Introduction

    but the battery i am using came out of an old dead UPS so it was only designed to hold a charge for 10-15 min for a computer and a monitor