An old Ni-Cad battery cell can be over-charged for years at 10% of its mAh rating but a modern Ni-MH cell should have an intellegent charger turn off the charging when the cell is fully charged.Hi Bernard, i read from a site saying we can only charge not more than 10% of the battery capacity. Isn't your circuit is overcharging it?
by Jake Hertz
by Duane Benson
by Jake Hertz