Power Sag - Voltage below 80% to 85% of rated RMS voltage for one or more cycles.
Dry Cell - A cell with immobilized electrolyte. The term "dry cell" is often used to describe the Leclanche cell.
Thermistor - A temperature sensitive resistor, usually made from specially processed oxides.
Battery cells - The interconnected battery elements that supply electrical power created by electrolytic reaction.
Temperature Cutoff (TCO) - A protective or safety device (e.g., thermostat, PTC, etc.) which senses temperature (e.g., in a battery) and opens or cuts off the electrical circuit if the specified temperature is exceeded, thus preventing a further rise in temperature due to the charge or discharge of a battery.
Blackout - A zero voltage condition lasting for more than two cycles. Same as a power failure
Voltage-Keyed - A system which incorporates a mechanical identifier on batteries and devices to ensure only batteries of the correct voltage are connected to the device.
