The HP Pavilion Dv7 is an entertainment laptop, powered by a rechargeable lithium-ion battery. The amount of time that the battery can power the laptop for varies based on the age of the battery, the programs being run by the computer and the users computer settings. If you need to know how long your HP Pavilion DV7 battery can power your Hewlett-Packard laptop, test the battery.
Press the “Power” button to turn off the HP Pavilion DV7 laptop.
Insert the power adapter jack into the power adapter outlet on the computer. Plug the opposite end of the cord into a working electrical outlet.
Allow the power adapter to fully charge the battery. This process should take up to four hours.
Remove the power adapter from the computer. Press the “Power” button to turn the laptop on. Write down your start time.
Use the computer in a normal manner. Use the programs you normally do to get a more accurate time estimate. Some programs, such as video players and games, use more battery power than other programs, such as Word or email programs. Continue using the laptop until the battery dies. Write down the end time.
Compare the start time to the end time. This gives you an estimate on how long the laptop battery will run. If desired, you can repeat this process again using different laptop programs or settings to compare how the life of the battery is affected by different programs or settings. Also note that over time, the laptop battery will slowly lose efficiency. If it could power your laptop for two hours when it was brand new, it may only power it for 90 minutes after it has been used for a year. This is normal and there is no way to prevent it.



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