How to Extend Your Laptop Battery's Useful Life


The useful life of a Li-ion battery is 300-500 recharge cycles. For most people, this means a 1-3 year life before the battery loses its ability to hold a reasonable charge. All batteries will eventually wear out, but here are some battery basics that will help to ensure that your battery has a long, useful life.

Exercise is Good.
One of the most common reasons for diminished battery life is simply lack of use. When the laptop is plugged into the ac adapter, the battery remains in a “standby mode” as the secondary power source. In order to keep the battery cells active and their energy-storing capacity at maximum potential, your battery pack needs some exercise.

Unplugging your computer from the electrical cord and operating on battery power at least 3-4 times each month is enough to keep the battery cells active.  

Don’t Drain it to Empty.
Li-ion batteries wear out faster if you run them to empty. Research has shown that Lithium batteries last longer if you recharge them before the battery reaches 20% of its remaining capacity. If a lithium battery is completely exhausted of its energy and the voltage drops below its critical 2.3 volt reserve power, the battery pack may not be able to be recharged. If your battery is in a weakened state where the battery has not had partial discharge and recharge cycles recently, taking your battery to empty can sometimes ruin your battery.


People often confuse the maintenance procedures of Ni-Cad batteries and Li-ion batteries. Ni-Cad batteries feature a battery technology often found in power tools. These types of batteries required you to run the battery all the way to empty before recharging the battery to get the optimum battery lifetime. However these types of batteries have never been used in laptops. Your cell phone batteries will also benefit from a longer life if you avoid running the battery to empty.


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