Sony Walkman MZ-NF610 Operating Instructions Manual page 21

When playing
Batteries
NH-7WMAA nickel metal
hydride rechargeable battery
LR6 (SG)
Sony alkaline dry battery
When using the radio
Batteries
NH-7WMAA nickel metal
hydride rechargeable battery
LR6 (SG)
Sony alkaline dry battery
SP
Stereo
14.5
36
FM/AM TV/Wb(weather) (USA model only)
7.5 7
18.5 17
(Unit: Approx. hours)
LP2 LP4
Stereo Stereo
15.5 17.5
42.5 48
(Unit: Approx. hours)
21