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What are the options, how ever clunky and lowtecho, for stringing up X amount of off the Plaid Pantry shelf batteries to power up these puppies. I envision maybe getting an hour or three off of a set of rechargables perhaps or slightly longer with on offs. |
What are the options, how ever clunky and lowtecho, for stringing up X amount of off the Plaid Pantry shelf batteries to power up these puppies. I envision maybe getting an hour or three off of a set of rechargables perhaps or slightly longer with on offs. |
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The goal is to have a solution to make an adapter once and have a power supply options that can be got at the drop of a hat from a local store if need be. |
The goal is to have a solution to make an adapter once and have a power supply options that can be got at the drop of a hat from a local store if need be. |
TomHiggins ' Question
- What are the options, how ever clunky and lowtecho, for stringing up X amount of off the Plaid Pantry shelf batteries to power up these puppies. I envision maybe getting an hour or three off of a set of rechargables perhaps or slightly longer with on offs. The goal is to have a solution to make an adapter once and have a power supply options that can be got at the drop of a hat from a local store if need be.
KeithLofstrom 's Answer
Interesting question. A garden variety Alkaline D cell will produce 10 Amp-hours. These have a voltage of 1.5V, and drop to 1.2V near end-of-life; an energy store of 13.5 Watt-hours. So 6 of those would produce 9V new, 7.2V end-of-life, just enough voltage to keep a WAP going. At an average of 5.5 Watts for the WRT54G, that is about 14 hours of running time for one WAP, 7 hours for 2.
The cheapest way to power a WAP for a LONG time is to use a car battery. While it is probably NOT a good idea to connect the WAP to a car battery while the car is running (alternators and ignition systems make nasty voltage spikes), wuth the engine off it should be OK. A typical car battery stores >12 volts at 50 Amp-Hours, or 600 watt hours. That's 4 days of running time for a WAP.
As long as you can get the hood opened and the battery out of there before the owner comes back, that is less than 2 crimes per week