HP Pavilion dm4 Maintenance And Service Manual page 12

Power requirements
Security
Operating system
Serviceability
4 Chapter 1 Product description
TouchPad with Mylar click pad cover (taps and
multitouch gestures enabled by default)
9-cell (93-Wh) 2.80-Ah Li-ion battery
6-cell (62-Wh) 2.80-Ah Li-ion battery
6-cell (55-Wh) 2.55-Ah Li-ion battery
65-W AC adapter with Smart-Pin DC connector
90-W AC adapter with Smart-Pin DC connector
Kensington Security Lock
Fingerprint reader with Digital Persona Software
Support
Preinstalled:
Windows 7 Professional (64 bit)
Windows 7 Home Premium (64 bit)
Windows 7 Home Basic (32 and 64 bit)
FreeDOS
RedFlag
End-user replaceable parts:
AC adapter
Battery (system)
Hard drive
Memory module
Optical drive
Mini-card device
SIM
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