Epson ELPIU03 - Manual (Page 13)

Before you can use the pen, you need to install the batteries.
a Press in the tab on the battery cover as you lift the cover off.
b Install two batteries, inserting the + and - ends as shown.
c Replace the battery cover and press it down until it clicks into
place.
a
• To check the batteries, press the button on the pen. If the battery
indicator is green, the batteries have enough power. s p.9
• When replacing the batteries, use two alkaline AAA batteries.
Installing the Pen Batteries
13