I have the bkb 10 white keyboard that i bought on ebay, new in box. It does use 2 aaa batteries. It is very thin and light, and it has a number of special samsung keys -- home, back, search, etc etc. The keys also have a nice touch and tactile feel. It is just a tiny bit narrower in length than the np12.2 when in landscape-typing mode. I actually like it better than a bluetooth logitech kb I bought for the np12 that is much heavier and has fewer special keys. I paid $35 for the samsung kb. Well worth it. I'm not even sure the other one you mentioned is available anywhere. I do know that b&h had a samsung keyboard recently for $88, but I don't see it on the site anymore. With the np12 and the samsung keyboard and a small mouse, the whole pkg is very portable.