The Cannon CB-2LW came when I bought my Cannon powershot G9 but can be bought separately for $30-40. Some other Cannon models can also use this battery charger. It's compact so it's easy to lose that's why many people end up buying a replacement. It looks simple but it's also a very efficient charger. You slide in your battery, and it stays in place easily. There is a light above the slot that changes from red(still charging) to green (finish charging). You plug it into a wall outlet, you can also plug it upside down to make room for other devices. The plug can snap into itself so that it can remove bulk when your not using it, and good for portability.
This can work in another country if you purchase a converter tip.
Input: 100-240V AC 50/60 Hz.
It takes about and hour to an hour and a half for a battery to fully charge, depending on the battery.
Overall this is a pretty good battery. I'm glad to have this, anyone with certain Cannon camera models should have this.