Cell Phone battery for a light

bobisculous

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What say you? Is it possible?

I have a 3.6V, measuring 4.0V on a multimeter battery, lithium. Could it be used perhaps for a direct drive light or something? Would be really useful as a backup, if it must be used light or something, requiring some crazy quick wiring or something or other, you get the idea.

The only thing I can see being a problem would be charging it, but I still have the phone itself, and charger for it, so I can charge it.

Cameron
 

Lynx_Arc

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I have a few lithium cell phone batteries sitting around I got for a dollar apiece or pulled out of broken phones. I don't have any chargers to speak of for them though so I haven't bothered trying to find a use for them. The ones I have are thinner than a AAA cell so they could be used for a thin compact light for sure.
 

bobisculous

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Yea,

Sounds like a easy, quick plan that I will have to try. I will have my eyes on the lookout for a small light of some sort that would fit this battery, then worry about sticking a 3w lux in there.

Cameron
 

Mike Painter

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Sep 16, 2002
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They sell batteries with flashing lights and vibrators on them. It might be worth picking one up just to see how it's done.
 

Tritium

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Texas, USA
Hi Cameron, I am using Motorola Lithium Ion SNN5571A 1100mah(about the same size as the Indium battery) and SNN5705B 800mah. I use old phones for chargers as you indicated. I work for a cellular provider and these were rescued from the trash bin. I have about 10 of each so I could not let them go to waste. List is about $40 bucks each. I have run test with Electrolumens hyper circuit board with a 1 watt lux. They will power it for about 1 hour and 15 minutes before the protection circuit shuts the battery down abruptly. I have yet to build an actual light but I am working on one based on a cell phone display dummy (a gut-less phone). I might try running some in parallel for extend run time. I would be interested to see what you come up with.

Thurmond
 

Lynx_Arc

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I just saw something that could be a lithium battery for a cell phone... it was a cell phone $ blinky thing battery normal list is about $30... but was in a dollar store. looks to have about 20 or so smd leds in a dollar sign pattern that supposedly blinks when a call comes in.
 
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