New owners of the EZ Reader need to know that the unit ships without the battery installed. Although there are instructions near the beginning of the manual on how to install the battery, there is no clear indication that the battery is not installed. I was aware that there was a battery in a small box but assumed that it was a spare, just as there are spare screws for the battery "door". The unit indicates that the battery is charging even though there is no battery installed.
I wasted the entire night charging a nonexistent battery. This morning when the unit was dead without being connected, I decided to swap the "dead" battery for the "spare" battery only to discover that the "dead" battery was not there.
An interesting oversight in Astek's manual.