Main performance parameters of the battery–four
The Charge and discharge rate
There are two expressions :the rate and the ratio. Rate is the time that charge and discharge time shows, that the charge-discharge rate is numerically equal to the battery's rated capacity (ampere-hour) divided by the provisions of the charge and discharge current (security) obtained the number of hours. Rate charge and discharge rate is another notation, the reciprocal is its value too. The original battery discharge rate is discharged through a fixed resistor to the termination voltage is the time to express. Discharge rate has the greater impact on battery performance.
Impedance
The battery has the great Electrode - electrolyte interface area, it can be equivalent to a large capacitor battery and the small resistor, inductor series circuit. But the reality is much more complicated, in particular, the impedance of the battery and the DC level over time change, the measured impedance is only valid for specific measurement of the state.