What is the smallest battery source that i can use to support a device much like an old beeper and a green LED. The beeper only works once or twice per year 4 times at the most, the green LED will be used fulltime. The battery source can not be rechargeable, and cheaper is better.
I have an HP lap top mod HP 5160 US recently it failed to start up took it to a repair shop, guy had to re set mother board ???? Still failed to start until he put an 18.5 volt power pack into the system, Im using a generick power pack that puts out either 18 or 19 volts,I was using 18 volts...