"I love that you've brought this to attention. An extensive database of uncommon but resistant and hardy plants/foods could be developed and organized by climate. Ease of growth and processing should also be taken in to account. I will try to…"
A crash course in changing the world.
Solar powered AAs
Okay, so I did a little research and this is what I found.
A solar powered AA battery charger goes for $4.99 on Amazon.com, can be more for bigger or more diverse chargers, but I think this will work for the task at hand. This one charges 4 AA batteries.
A Turbo Charge TC² Portable Charger for the iPod and iPhone goes for $13.98 on Amazon right now. It takes two AA batteries and has good reviews.
A four pack of Duracell rechargeable AAs goes for $9.96 on Amazon. Other brands can be cheaper, but this is a brand I'm okay with using.
Charging an iPhone takes 7/1000 kWh. The iPhone has a 1400mAh battery that chrages using 5 volts. Watts = Volts x Current Watts = 5V x 1.4Ah = 7 WattHours.
Electricity (for me) costs $0.07 per kWh.
My family has a total of four iPod/iPhones.
$4.99 + $13.98 + $9.96 = $28.93 = total cost of the project
.007 kWh x 4 = .028 kWh = electricity needed to charge everything once
.028 kWh x $0.07 = $0.00196 = cost of charging everything once
$0.00196 x 30 = $0.0588 = cost of charging everything every night for a month
$0.00196 x 365 = $0.7154 = cost of charging everything every night for a year
So it doesn't seem like 71 cents is a big deal. What else can we use this for?
Two Xbox wireless controllers takes four AA batteries. This way we can skip the $13.98 for the converter. The controllers, with two AA batteries each, last between 20 and 25 hours. So if my brother and I play 30 hours a month (averaged out between the two controllers) that's three packs every two months, or 18 packs a year.
On average, a four pack of AAs costs $3.00. A four pack of rechargeables is $9.96 and the solar charger is $4.99. In reality, we'd need two packs of rechargeables, one in use and one charging. So, total price on the rechargeables: $24.91. 18 packs of disposable AAs: $54.00. Total saved in one year (average): $29.09.
Applied on a larger scale:
A four pack of rechargeable AAs costs around $10.00 and a four pack of disposable AAs costs around $3.00. Rechargeable AAs last half as long as disposables on one charge, but they can be charged 100 times. So one pack of rechargeable AAs is the equivalent of 50 four packs of disposable AAs, which would cost $150. This gives you a savings of $140 per four pack in the long run. Minus the one time cost of the charger.
Sitting here on the couch, I can see at least 20 AAs being used. So if all of those were rechargeable, that's $140 x 5 = $700. Plus, think of the gas you're not using to go buy more batteries, and the energy saved by not having to produce so many AAs. Those disposable batteries aren't going in a landfill somewhere, and no electricity is being used to recharge the AAs (solar powered, remember?).
All for an investment of $24.91 to get started.
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