The Pomera DM100 (Amazon) is lightweight and portable.
Here is an actual picture of the Pomera on a digital scale WITHOUT batteries. As you can see it weighs around 384 grams.
Kindle vs Pomera – Weight
Lets compare the weight of the Pomera to the Kindle Paperwhite. Coming in a 210 grams.
Weight with 2AA batteries
Finally here is the weight of the Pomera with 2 AA Duracells. This comes to 433 grams.
So you can see that the Pomera DM100 is just a bit heavier than your standard run of the mill Kindle.