Hertz - The standard unit of frequency. A frequency of one complete cycle per second is a frequency of one hertz.
Ambient Humidity - The average humidity of the surroundings.
Gravimetric Energy Density - The ratio of the energy output of a cell or battery to its weight (Wh/kg). This term is used interchangeably with specific energy.
Energy Density - The ratio of the energy available from a battery to its volume (Wh/L) or weight (Wh/kg).
IEC (International Electrotechnical Commission) - Advisory organization that draws up international standards in the electrotechnical field.
Distortion (total) - Ratio between the rms value of all harmonics of a non-sinusoidal alternating periodic value and that of the fundamental. This value may also be expressed as a function of the individual distortion of each harmonic Hn= Yn /Y1.
Voltage Reversal - The changing of the normal polarity of a battery due to overdischarge.
