Sony Cyber-Shot DSC-KW1 Reference Manual page 12

Operating temperature:
0 °C to 40 °C
Storage temperature:
–20 °C to +60 °C
Dimensions:
Approx. 50 mm × 22 mm × 54
mm (W/H/D)
Mass:
Approx. 48 g
Rechargeable battery pack NP-BN
Used battery:
Lithium-ion battery
Maximum voltage:
DC 4.2 V
Nominal voltage:
DC 3.6 V
12
Maximum charge voltage:
DC 4.2 V
Maximum charge current:
0.9 A
Capacity:
typical: 2.3 Wh (630 mAh)
minimum: 2.2 Wh (600 mAh)
Design and specifications are
subject to change without notice.