NiMH discharging

The discharge characteristics of nickel-metal hydride batteries are affected by current, temperature, etc., and the discharge voltage characteristics are flat at 1.2V, which is almost the same as far Ni-Cd batteries.

The discharge voltage and discharge efficiency decrease in proportion as the current rises or the temperature drops.

Compared with Ni-Cd batteries, nickel-metal hydride batteries have inferior high-rate discharge characteristics, making them less suitable for use in applications requiring highcurrent discharge. As with Ni-Cd batteries, repeated charge and discharge of these batteries under high discharge cut-off voltage conditions (more than 1.1 V per cell) causes a drop in the discharge voltage (which is sometimes accompanied by a simultaneous drop in capacity)

The discharge characteristics can be restored by charge and discharge to a discharge end voltage of down to 1.0V per cell.