Somebody at Samsung apparently forgot that its very popular Galaxy S handset (in all its varieties) has -- are you ready for this -- a user-replaceable battery. Now, we don't mean a warranty breaking, two-screws-and-it's-out replaceable battery. No, the battery in the Galaxy S is designed (and promoted) to be switched out by the user. Just pry off the back cover and there it is, ready to swap whenever more juice is required. So why anyone would slap a big, bulky, external slab onto their svelte S is beyond us, regardless of the extra 8.5 hours of talk time listed in the Samsung Germany newsletter. We'd understand if it had a working GPS radio, but like the Galaxy S, it doesn't.