This is memory effect in Ni-ca type battery. In general , charge /discharge 3 time the memory effect will dispear but have to consider about cycle life , you can say it is aging if this battery has been used for a long time.
Ni-Ca , Ni-MH used 0dV, -dV or dt/DT as charge full detect condition, I guess your charger is dT/DT detection , you may know temperature need time that is reason why you can charge 1000mA after charged full . |