I need a new power supply for my Black and Decker GS500 3.6V DC cordless grass clipper. I have not been able to find a Black and Decker replacement power supply. The original power supply label shows output 8Vac 250 mA.
I have a power supply with the unit label showing output AC 6V 300mA. The no-load measured output is AC 7V.
My AC power supply voltage is 25% lower than the design input to the charging circuit. I am not clear as to how that impacts the output of the charging circuit and its ability to charge the 3.6V DC battery.
Is it OK to use the lower voltage power supply? Will I damage the clipper charging circuit or the power supply? Will the charging circuit try to draw more amps than the capacity of the power supply?
This question was asked in Electrical Engineering and put on hold as off-topic.
Edit 6/8/2019 The charging circuit consists of the power supply, the battery pack with 3 Ni Cd batteries, and a 4-inch long blue device (see image). The black lead from the power supply is connected to the positive terminal of the battery pack. The negative terminal of the battery pack is connected to one end of the blue device. The other end of the blue device is connected to the black/white-stripe lead from the power supply.