Sony CFD-G30L - Manual (Page 24)

Setting Up 24 GB
Choosing the power sources (continued)
3 Inserting batteries into the remote
(CFD-G50/G50L only)
Insert two R6 (size AA) 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.