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.
The best way to check battery charge is with a digital voltmeter. A fully charged battery should read 12.65 volts. A reading of 12.45 volts equals about a 75% charge and is good enough for further testing. Anything less means the battery is low and needs to be recharged.