Dell S300wi Projector - Manual (Page 42)

42 Using Your Projector
Installing the Interactive Pen Batteries
NOTE: Remove the batteries from the interactive pen when not in use for a long
time.
1 Press the tab to lift the battery slot cover.
2 Check the polarity (+/-) marking on the batteries.
NOTE: Recommend to use two AA 1.5V alkaline batteries
for longer battery life. The life duration may be varied
from different brands/manufacturers of alkaline battery.
3 Insert the batteries according to the polarity marking in
the battery slot.
NOTE: Avoid mixing different types of batteries or using
new and old batteries together.
4 Slip the battery slot cover back.