Over-discharge protection circuitry

A portable apparatus having a portable portion and a body portion, said portable portion including a battery, a load an two charging terminals connected to the battery and said body portion including a battery charger adapted to be connected to a power source and two charging terminals connected to the battery chargers, the terminals of the body portion being connected with the terminals of the portable portion to present a charging circuit when the portable portion is placed on the body portion, said apparatus further including an over-discharge protection circuit for this charging circuit comprising:

• a first resistor circuit connected electrically across the battery charger for conducting a discharge current when a power source connected to the battery charger is accidentally turned off while the battery is being charged;
• switch means electrically connected between the load and the battery for selectively connecting or disconnecting the load from the battery;
• switch control means electrically connected across the battery and operably connected to the switch means for normally operating the latter to electrically connect the load and the battery;
• a second resistor connected between the battery and the switch control means for controlling the flow of current to the latter;
• and
• a diode connected between the switch control means and the first resistor for diverting the flow of current from the switch control means to the first resistor when the power source of the battery charger is accidentally turned off.