Yup. Just check that they're OEM Samsung batteries and they'll be the same as you'd get from VZW for a lot more. I got a few for my OG Droid and they outlasted my use of the phone. Got two this time just because they were so cheap, but haven't had a reason to use them yet, though I have one hot-charged. Usually takes 10 days or so to get to you by China Post, but there's no scam. They're just dirt cheap there and they still make a little sending them along.
The wall charger is fine, just don't ever bother trying to use the USB on it. I know it used to drive the screen bananas and phantom click all over the damned place. It's cool for the battery alone tho.