It’s designed to use with fingers, it has many cool gestures that require multiple fingers. It’s not a tool for artists.

Zunivolo, batteries loose their capacity even if they aren’t used

Liam, no way! Considering that the battery gets about 5 charge cycles a year, 2-5 years lifespan is very low (especially for a keyboard). Otherwise I’d rather buy the 3rd generation keyboard.

Does the replacement battery comes with the same strong adhesive as the original battery?

There is a not 2012 MBA entrails on the photos. Maybe a newer MBA (double mic).