The tricks for maximizing your lithium-ion battery’s useful lifespan—that is, the number of times you can recharge it before it no longer accepts a charge—are pretty basic. Three things will prematurely age a lithium-ion battery: consistently draining it to the automatic shutdown point, exposing it to heat, and overcharging/overvoltage-charging. That last practice is actually dangerous and can lead to fire or even an explosion.

The most obvious battery-draining component that you can turn down—or leave off when it’s not in use—is the display. Reduce the brightness as far as you can, and turn it off when you don’t need it. Reduce idle period in the automatic shutoff setting. The more aggressive you are about curtailing your display’s energy use, the more battery(such asAccu Acer Aspire 9010) life you’ll conserve. If you’re in dire straits, manually shut it off as quickly and as often as possible.

So far, everything I’ve discussed applies to any mobile computing device. But you can do a lot more when the device in question is a laptop. Aside from dimming your display and turning off radios,you can turn off a host of other hardware, such as back-lit keyboards, FireWire ports, Wi-Fi, serial and composite ports, webcams, sound and auxiliary video controllers, and your optical drive (if your laptop even has one). The power savings when disabling any one device might not be great, but disable a bunch and it can make difference.

It all boils down to this: To extend run time, turn stuff down or off. To extend a lithium-ion battery’s lifespan, don’t consistently drain it to low levels or regularly expose it to heat. Store the battery(such asAccu Acer Aspire 4250) at 60 degrees with a 40 percent charge. Batteries are all about freedom, so try to develop good habits without killing the joy.

The number of recharge cycles you’ll get from your lithium-ion battery drops with how far you drain the battery regularly. You can get as many as 5000 cycles if you discharge it to the 90 percent level each time, and perhaps only a few hundred if you habitually run it down to 10 percent before recharging. Don’t go crazy trying to stay tethered all the time. But you might want to break yourself of the habit of waiting until the low battery(such asAccu Acer Aspire E1-531) warning lights up before you plug in.

Now let’s dive into the software. I already talked about running only one application at a time, but you may also be running dozens of convenient, but unessential background processes—software updaters, printer and scanner control panels, online storage service apps, and more. To turn off unnecessary processes, use the Windows find function as described above. But this time, typetask manager. Alternatively, right-click the taskbar and selectStart Task Manager, or press Ctrl-Alt-Delete and select the same item. Once the Windows Task Manager dialog box appears, select theProcessestab and peruse the process names and descriptions.

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