Sony Walkman MZ-NF610 Operating Instructions Manual page 21

When playing
Batteries SP
Stereo
NH-7WMAA nickel metal 14.5
hydride reehargeable battery
LR6 (SG) 36
Sony alkaline dry battery
(Unit: Approx. hours)
LP2 LP4
Stereo Stereo
15.5 17,5
42.5 48
When using the radio
Batteries FM/AM
NH-7WMAA nickel metal 7.5
hydride rechargeable baRery
LR6 (SG) 18.5
Sony alkaline dry battery
(Unit: Approx. hours)
TV/Wb(weather) (USA model only)
7
17
21