The above photo has four jacks/plugs facing each other. On the left there are two 12 Volt DC power sources: AC to DC wall adapter and clips to AC bicycle dynamo/generator with rectifier circuit. On the right there are two power sinks: OLPC laptop and computer speakers / audio player. Using just RCA jacks was very convenient, as a splitter (not shown) could be used with the extra jack going to a multimeter for live voltage monitoring.
The "alternative" source of power (compared with the AC adapter that plugs in the wall): a bottle dynamo for a bicycle. This is actually a generator that produces AC power, normally used to power a front and rear light. I think it's a fantastic, low cost, readily available power source in third world countries.
My time in India would not be complete without some sort of work outsourcing, and so I embraced globalization (well, down-the-street-ization) and had the resident engineer at Rajni Radio design the solutions to my problems. It was an iterative process, to say the least. :-) And I can definitely attest to the notion that labor is cheap in India as a result of my outsourcing!