Ask Engadget: how long should I first-charge a battery?

We know you've got questions, and if you're brave enough to ask the world for answers, then here's the outlet to do so. This week's Ask Engadget inquiry is from Bernard, who wants an answer to the age-old question of ensuring you get the most out of your batteries. If you're looking to ask one of your own, drop us a line at ask [at] engadget [dawt] com. "It's said that you should always leave brand-new electronics plugged in for 'a few hours' after being fully charged, but how do you decide that...