An NMR apparatus disposed in a wellbore and having an array of two or more NMR sensors located at substantially the same axial position on the NMR apparatus and having different directional sensitivities is used to acquire an NMR signal from at least two of the two or more NMR sensors. The electric accumulator includes an ultra-capacitor array for storing electrical energy, which can later be used to power an aircraft device. Also disclosed are honeycomb bodies having the disclosed cement compositions applied thereto, and methods for making same. The secondary devices acquire sensing reports of received signal strength, location and channel information of the primary devices. Such crosslinked polymers may be used to make polymer electrolyte membranes that may be used in electrolytic cells such as fuel cells. In the low power mode, the output voltage is equivalent to the input voltage.