1.0 link Rainbow Dash Network http://rainbowdash.net/ Techdisk (techdisk) http://rainbowdash.net/techdisk http://rainbowdash.net/notice/3865977 And with the fact the mouse uses different amounts of amperage at different times, a simple resistor will not work to lower the voltage properly. Ohm's law, Voltage equals current times resistance, shows that only having a resistor to drop the voltage in a constantly changing current will make the voltage constantly change. Also, 9 volts down to 1.5 is a lot of wasted power from heat.