Step 2Electrical assembly
First hack the battery apart! BE CAREFUL! Litiums get very angry when shorted and can explode. Be nice and patient!. If you look closely at the battery pack you'll see a seam. With patience and a cutting tool you can crack the seam and then pull it apart with needle nose pliers. Once the bottom of the pack is pulled off, use a non conductive object to push the cells out of the pack.
Once out you'll notice that the 223 pack is actually (2) cells wired together. Cut the strip that joins both batteries in half so you have something to solder to. You'll need to connect a positive lead and a negative lead to each battery. The strip that joined the batteries can be soldered to if you're a good solderer and dont overheat anything. Too much heat and the battery can explode. I'm very proficient at soldering so I soldered to the tabs on mine then lightly scored the top cap on the cells and quickly soldered leads on them. You may want to try another method such a modified battery holder if you feel queasy about soldering onto batteries!
Once the leads are in place you need to note the polarity and placement on the batteries that came with your LED light thingy. Once you figure out how its wired, pull the little batteries out and solder your leads from your big batteries to the circuit board on your LED thingy. Make sure you've got your polarity correct, do it wrong and you've burned up your throwee! The particular LED blinky I was using used two 3v litium calculator batteries. What we are doing is replacing the calculator batteries with something thats got much more capacity.
The new pack should make your LED throwee last for weeks if not a month or so! Tape up the pack so it cant short on anything.
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