is larger than the capacitance c 2 parasitic to the resistor r 3 and the capacitance c 3 parasitic to the resistor r 4 the larger a capacitance is the significant the capacitive effect will be more significant capacitive effect is easier to produce error operations for example with a predetermined threshold of 300v for the capacitor voltage vout to stop charging the capacitor c o a significant capacitive effect may result in earlier stop of charging the capacitor c o before the capacitor voltage vout reaches 300v in the charger 200 the resistors r 3 and r 4 are used to replace the resistor r 2 and therefore the equivalent parasitic capacitance c 4 will have a value determined by 1 c 4 1 c 2 1 c 3 eq u2062 u2062 4 c 4 c 2 u2062 c 3 c 2 c 3 eq u2062 u2062 5 from the equation eq 5 the equivalent capacitance c 4 is smaller than the capacitances c 2 and c 3 and is therefore smaller than the capacitance c 1 in other words the charger 200 will have less significant capacitive effect fig6 shows a second embodiment of a voltage sense apparatus and method according to the present invention in a capacitor charger 300 a transformer 302 has a primary coil l 1 and a secondary coil l 2 with a turns ratio of n p n s to transform the primary coil voltage v bat to a secondary coil voltage v l2 through a diode 304.