Alright, you've purchased your Canon 40D, and you've gotten the box and opened it up. The first thing that you're going to want to do, is find the battery pack, because it most likely will not be charged. Your battery pack will look like this. It should have a cover on the back, which is easily removed. You just crank it off, just slide it off like that. Your back cover will come off. Then, what you're going to want to do is, find the charger. There are two kinds of chargers. In this case, I have the CG580 charger, which is, this charger just plugs straight into the wall, instead of with a cord. So, what you're going to want to do is, go ahead and stick your battery on the charger. There will be an arrow on the battery, that tells you which direction you need to put it on the charger, just follow that arrow. Go ahead and stick it on there. Then, what you're going to do with this charger is, if you look on the back, there's a plug that just needs to be pulled down, like this. Then, you can just take the charger, and stick it into the wall.