Those looking for the most in portability, should check out the AXIS-100 digital pocket scale. 

Featuring a straightforward but highly functional design, this scale comes with two expansion trays allowing you to handle all weighing tasks with ease. The trays also encase the scale for safe carrying and storage.

Designed for a capacity of 100g x 0.01 g the scale features a small backlit LCD screen and easy three-button operation. It's powered with 2 AAA batteries which are included and backed with a 10-year limited warranty for a worry free purchase.