Which is to say: what's truly dead is the single-purpose electronic device.
Modulo reliability and/or battery life / power consumption. Power draw on single-purpose devices can be very, very, very low. It's going to be a while before you can power a tablet with a postage-stamp sized PV cell or thermocouple. But 1-800-YOU-WILL.
Modulo reliability and/or battery life / power consumption. Power draw on single-purpose devices can be very, very, very low. It's going to be a while before you can power a tablet with a postage-stamp sized PV cell or thermocouple. But 1-800-YOU-WILL.