Sony PBD-D50 Operating Instruction page 74

Detaching the battery pack
p a c k . e r y b a t t t h e c h d e t a t o R E L E A S E B A T T d e S l i
p a c k . y b a t t e r t h e d r o p t o n o t c a r e f u l B e
BATT RELEASE
74