Sponsored Topics. Ruffin is an unincorporated community located in Rockingham County, North Carolina. It is northeast of Reidsville, North Carolina and southwest of Danville, Virginia just off US 29 (Future Interstate 785). It has a population of 2,116[citation needed].
Test your battery using HP Battery Check. Running HP Battery Check with HP Support Assistant installed: Running HP Battery Check without HP Support Assistant installed: 1  Click Start. 2  Click HP Support Assistant. 3  Click Troubleshoot. 4  Click the Power, Thermal and Mechanical button. 5  From the Power tab, click HP Battery Check.
Turn your laptop adapter over and locate the voltage output. Voltage ratings are typically found on the bottom of the laptop adapter. Step Three. Grab the Volt / Multi Meter and insert the red wire into the slot marked with a + sign (positive). Plug the black wire into the slot marked with a â sign (negative).