In order to measure the exact capacity of each rechargeable battery under certain discharge conditions (from 100 to 500 mA), charge the battery until it is full and then discharge until it is empty and charge it again.
The capacity in mAh is simultaneously displayed
By this way, bad or low capacity batteries can be sorted out and replaced.
The battery will be continuously charged and discharged with a user selectable current and the capacity is monitored, until no further increase in capacity is noted. The maximum cycles is 50.
By this way you can reactivate old NiCad or Ni-MH batteries.