Do you always plug in your laptop as soon as you get home? Or do you wait until the battery is completely discharged before doing so? As more and more people have started using laptops as their main computers, battery myths exist all over the place. The question is, what do you need to do to maximize the charge of your laptop?
The answer is simple: in order to maximize the lifespan of your battery, you need to start charging it only after it's almost completely discharged. If you do so, you'll end up getting the most out of your battery. If you tend to leave your laptop at home, plugged in all of the time, then your best bet is actually to remove the battery of your laptop so that you save it when you actually need it. Your laptop will still work if it's plugged in.
In most cases, unless you really need the full power of your laptop, you can easily squeeze out a few extra hours by using a 'quiet office' setting, in which the screen in dimmed and you don't use as much juice as with the full brightness. You most likely also have a switch to deactivate the WiFi and Bluetooth antennas. If you're not online or if you're using a plugged Ethernet cable, then switching the WiFi off will also add more life to your charge.
If you've got a MacBook, then you can't take out the battery. However, MacBooks have got a really advanced battery inside of them. Apple claims that it can have up to 1,000 recharges. After 5 years, the actual charge will diminish to 80%. Adaptive charging will also minimize battery charging when the computer is plugged in to extend battery life. Also, Apple recommends calibrating your battery every two months, to maximize your battery charge.
Basically, you should only charge your laptop when you need to, otherwise use your battery and disconnect when you're on the go.