42g Cell Phone

I thought this was pretty neat for ultralight backpackers who feel a need to carry a phone along:

http://www.elari.net/cardphone_eng/

It’s basic and doesn’t have the best battery life in the world, but seems a perfect fit for a lightweight backpacker that just wants basic call/text functionality.  The 3-day battery life can be conserved by keeping it turned off, and if you carry a power bank anyways, this can be recharged easily using that (and only takes 220mAh to recharge).