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Battery Pack

Posted by chris kennington on

1) Get two "4 D Battery Holders". 

2) Wire these in series (black of pack 1 to red of pack 2) to produce 12 volts (8 x 1.5 volts per battery = 12v). 

3) Wire the positive (red) of pack 1 to the center terminal of a "Size M Coaxial DC Power Plug".  

4) Wire the negative (black) of pack 2 to the outer terminal of the power plug. 

This will run the IQ for several long cooks.  I got 6 long cooks out of mine before I stopped testing it.  Use rechargeable D cells to save money. 

Note that soldering is required to join the wires together and to the power plug.  Use heat shrink or electrical tape over all electrical connections.


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  • Rechargeable batteries such as AAA through D cell put out 1.2 volts not 1.5. If you’re going to use rechargeable batteries you’ll have to use 10 not 8 or you’ll be running 9.6 volts. Rechargeables have less voltage drop throughout their use compared to alkaline. Just food for thought before building this.

    Tim S. on

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