Hello again All!
I've been fiddling with homemade Aluminum-air batteries and would like to put them to some practical use. We might be in for a couple more bad hurricanes here so I wanted to make a cell phone charger that runs off an Al-Air cell. With a single cell and not using any "dangerous" chemicals I get about 0.8 Volts and the inside surface area of a beer can gives me about 250 mA. If I use a voltage doubler type circuit to step up the 0.8V to 4 Volts am I correct in calculating that I will reduce the output current to 50 mA (250 divided by 5)?
Second, I was told that as long as I have any sort of overvoltage I can connect leads directly to the cell electrodes and charge, say, a 3.7 V cell phone battery. Is that correct?
And third, can anyone point me to a schematic for a good dc voltage "transformer" to get something over 3.7 V (about 4 i think would do...???) from just 0.8V from a single cell? Thanks everyone!
gizander