Unplug Your Laptop Regularly (When In Doubt)

A friend replaced her laptop's battery after only two years because it wouldn't hold a charge. I suggested she shouldn't keep her laptop always plugged in, but I wondered—was this outdated geek lore, rendered obsolete by modern batteries?

Yes and no. It depends, of course, on what kind of battery you have. Battery technology has come a long way over the years, and surely in 2009 you don't have to worry about how long your laptop's been plugged in. However, one major notebook manufacturer (which ships Lithium-ion batteries) thinks you should, and suggests adding a reminder to your calendar to deplete and recharge your battery once a month. To quote: "Apple does not recommend leaving your portable plugged in all the time."