First let's eliminate some questions about notebook battery, starting with the idea of removing the battery from the laptop and use it only at the source, in order to leave intact and increasing the battery life is a myth.

The battery unplugged the phone in the first months may in fact be covered from the beginning of the period of durability of its components, but soon after that time their Ions Lition will start to come into addiction, even if the battery technology promises to offer not memorization effect.

So keep the battery in constant use and get used to only load it when the battery is completely drained its internal energy and only remove the outlet when 100% charged. Typically, the HP notebook battery after the first use leaves to press and this percentage remains at 99%, this is not a defect, only effect normal use.

There is a need to avoid using it always filled with the power plugged in the external energy, is only recommended that every 12 hours of use in this way, explained the maneuver to be made up at least once. These tips can make your battery autonomy to increase by 50%.

To perform a test in the battery of your notebook, remove the battery from the notebook and use it with external power supply for a few minutes and compare the performance of your machine. If you notice improvement, then your battery is in the process of depreciation of its life. On these occasions, it is recommended to plug a new battery, carry some performance tests of the notebook and if identified improvements, invest in that component, may be worth it.

Unfortunately there is no software to test laptop batteries, only few scientific apparatus industry professionals who possess them, some promising to "reactivate / revive" battery charging 30% of the value of a new battery, most often not worthwhile