Such RF signals could be from nearby non-battery powered base stations or access points.
It is in fact feasible to design near-perfect full-duplex base stations owing to the available freedom (bigger size, non-battery-powered operation) in their designs (e.g., see [8 10] and the references therein).
To model an energy-harvesting game for the CRN-RF system, it is assumed that a cognitive radio network with multiple PUs and SUs; PUs are licensed and non-battery-powered network agents, and SUs are unlicensed network devices operating by batteries.
I'm really not sure if this is what Sony intended, but it functions like a non-battery operated instant selfie checker (maybe the world's first 'selfie camera' in that sense), or something you could use to take mirror selfies on the go — as I've done here.
In fact, there has been a resurgence of non-battery, non-quartz, non-digital watches -- automatic watches -- that require you to wear them or to put them in special spinning cases to keep them wound and working.
Much of this shift was a result of the U.S. lead consumers' compliance with environmental regulations that significantly reduced or eliminated the use of lead in non-battery products, including gasoline, paints, solders, and water systems.
The only phones that remained functional after Katrina were old-fashioned non-battery powered direct lines to Bell South.
This is to power a digital non-battery type thermostat and is not needed if your new one uses battery.
Avoid kites made of aluminized polyester film; fireworks; non-battery operated electrical toys; shooting toys and cap guns; and sharp-edged tools.
If your previous thermostat was a non-battery operated and the new one takes batteries you may have one wire from furnace that is not needed.
(The Razr Maxx, interestingly, has a non-removable battery, so no backups batteries for me).
