Sony CFD-G30 - Manual (Page 24)

Setting Up 24
Choosing the power sources (continued)
3 Inserting batteries into the remote
(CFD-G50 only)
Insert two size AA (R6) batteries (not supplied)
Replacing batteries
With normal use, the batteries should last for about
six months. When the remote no longer operates the
player, replace all the batteries with new ones.