Ohm

A unit for measuring electrical resistance or impedance within an electrical circuit.

Ohm's Law

Expresses the relationship between volts (V) and amperes (I) in an electrical circuit with resistance (R). It can be expressed as follows:

V = IR

Volts (V) = Amperes (I) x Ohms (R). If any two of the three values are known, the third value can be calculated using the above equation.

Open Circuit Voltage

The voltage of a battery when it is not delivering or receiving power.

Over-Discharge

The carrying of discharge beyond proper cell voltage; shortens life if carried far enough and done frequently.