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clontaago

First Grader
Fluffy you may be able to answer this one. I am going camping for new years and want to put some xmas lights up around the tent and tarp etc however there will be no power. Can I use a spare car battery that I have? How can I do it?
 

Fluffy

Journey Man
If they run on 12 volt then yes (note you will drain the battery obviously) Otherwise its a generator.

i think from memory most fairy lights have a transformer in them to take the current from 240 to 12 volt so you would need to remove this (ie cut the wires and directly wire them to the battery). However you would get better advice from a sparky, im not all that clued up on electrical stuff
 

Dan

Kim Jong Dan
Staff member
Administrator
Tipping Member
I will have a chat to my friend Mason. Though I think I can find some details for you anyway
 

Dan

Kim Jong Dan
Staff member
Administrator
Tipping Member
http://michaelbluejay.com/electricity/dc-christmas-lights.html

try that!
 

Dan

Kim Jong Dan
Staff member
Administrator
Tipping Member
Ic an probably help you rig up a few when you come up over xmas
 

clontaago

First Grader
Ok I have purchased a 12v 7.2 a/h battery pack from jaycar for $20!!!

I have been getting varying information on how long that will power the lights I have in mind. They are a strand of 100 LED lights using about 7 watts.

Now the calculation I have used is V x A = W

Therefore 12V multilpied by 7.2Ah = 86.4 Wh

86.4 divided by 7 = about 12 hours

Howvere on another web page I looked at it told me only about 6 hours.

Any ideas?
 

Dan

Kim Jong Dan
Staff member
Administrator
Tipping Member
i would split it in half mate say about 8 hours

Just take a few batteries is the winnder
 

Fluffy

Journey Man
take the lower estimate and you should be pleasantly suprised. as the battery fades so will the lights
 

earl

Bencher
Thats pretty good time. I mean you wont have them on all night, plus daylight saving , they should last most of the time your away. great idea aswell. We are going to have fireworks while out camping on new years but chrissy lights would top it all off.
 

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