Hi guys and gals, This may be a bit off topic, but your community seems like the most adept concerning my topic. In short, I want to build an emergency cell phone charger out of one AAA battery. Energizer has done this with one AA battery, so I assume that it is very possible. Link How are they doing this? If I just hook wires up to a AAA battery (let's say lithium) and hard wire that to a micro USB and plug it into my phone, would that work, being that the AAA battery is only putting out 1.225 volts and cell phone batteries usually put out around 3.8 volts? My goal is not to actually charge the phone battery, but to power the phone (a smart phone) for, say, 10-20 minutes. I know I could just purchase the Energizer contraption with the AA, but I really want to make my own and make it with one AAA. Any ideas, thoughts or advice will be greatly appreciated. Thank you in advance.