Sony's NP-FM50 InfoLithium M Series Battery provides up to 2.5 hours of continuous recording time. 

FEATURES:

• Up to 3 hours of recording time 
• 7.2V, 8.5 Wh with no Memory Effect 
• Built-in microprocessor accurately calculates remaining battery life in minutes 
• Resist memory effect 

SPECIFICATIONS:

• Dimensions (Approx.): 1 9/16” x 13/16” x 2 1/4” (38.2mm x 20.5mm x 55.6mm) 

• Weight (Approx.): 2.7oz (76g) 

• Chemical Consistence: Li-ion 

• InfoLithium®: Yes 

• Battery Series Name: InfoLithium "M" Series 

• Super Quick Charge: No 

• Mean Output Voltage: DC 7.2V 

• Capacity: 8.5Wh 

• Capacity Indicator on Package: Up to 2.5 Hours