CSI's unmobile cellphone

You can complain all you want about cellphones that are too big to fit in the front pocket of your jeans, but CSI's 410 Series cellphone isn't going anywhere. Seriously, it's an unmobile mobile phone that it is really a regular-looking deskphone that you plug into a wall for power (there's a battery, but it's only a backup in case the electricity goes out), but instead of hooking up to a phone jack, uses a cellular network to make calls (GSM networks, specifically, so you could use it with T-Mobile, Cingular, or AT&T Wireless). You can even do email and text messaging on the 410,
but the basic idea is that you're supposed to use it in those remote (or underdeveloped) places where it's impossible to get a landline but there is cellphone coverage. Though just to mess with everyone we're gonna get an external battery pack for one of these and walk around with it strapped to our waist.