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# Can these led strips be made to work off batteries? Answered

These led light strips look awesome. My question is can these be made to work off a battery system that would be portable enough to carry while roller skating. Here is the site of the product http://www.oznium.com/thin-led-strip I did post this on the end of an old question but not exactly sure people would see it at the end. Thanks for any suggestions

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It says they run off "your home 12V adaptor" (of course, we all have one of those...), so I guess they could run off a fairly lightweight battery-pack (they are only LEDs after all).

ok so I guess my next question is how many batteries are we talking? I would have one of these strips on each skate.

Or 6xAA. Or a couple of 9V plus extra resistance...

6xAA? A AA battery is 1.5V. 6x1.5V=9V. You need 8 AAs. Or better yet, 8 D cells for added life, though t that point a 12V sealed lead-acid would be easier...

any idea what kind of life a set of AA would last running these?

Well, according to the technical info given, the strip draws 200mA at 12VDC. Let's say a pack of 8 2000mAH alkaline AAs. (I found on Wikipedia the range 1700mAH-3000mAH. I chose the low end, correct me if I'm wrong, anyone.) A pack of 8 should have (8x2000)mAH, or 16000mAH, so that would be 80 hours, which seems a bit high. Anyone more intelligent, please tell me if I did that right. 16 AH seems high.

So I realize this thread is about 4 years old, but I did the same math - and then realized that this only works if the batteries are in parallel. If they're in series then it's one big 12v battery at 2000 mah which would power this particular strip of LED's for 10 hours.

would going 2 9v batteries with resistance give me better battery life than doing 6 AA batteries?

er... trebuchet?

what does a trebuchet have to do with batteries?

. I think he is trying to say he doesn't know the answer and is calling on trebuchet03 for help. . I'd try 6-8 AA/AAA batteries. Adding a resistor is easy, but inefficient. . You can get a rough idea of a battery's relative run time by looking at the size. AAAs (small) won't last as long as AAs, which won't last as long as a Cs, &c. . According to the link you gave, the strips pull 200mA each. Maybe someone can give a reasonable estimate of battery life using that tidbit.

Yeh, what Nacho said.

when I google 12v battery i get a good variety of them. Any particular one do I need to use? Sorry but this stuff is new to me. Ask me something about networking and computers and Im gold

If you used 8 AA's in series you'd be able to run two 1ft strips for about 3Hours with Duracell Ultras, They'd be really bright for the first 2-3 hours then get increasingly dimmer, they may be visible after 4 hours. You'd need a 12v AA battery pack like this http://hoyttech.com/images/products/HC_8AA_300.jpg
and all up that should weigh about 1/2Lb. If you wanted to run longer you could get a SLA or Sealed Lead Acid battery, they can be recharged and a 5.0Ah one will last about 10-12hours and weigh 4Lbs