Power Supply
Models with integrated graphics: External 65-watt Smart AC adapter
External 90-watt Smart AC adapter
6-foot (1.8-meter) power cord included; total length including external AC adapter is 12 feet (3.66 meter)
HP Fast Charge
*
* HP Fast Charge recharges your battery up to 90% within 90 minutes when the system is off. HP Fast
Charge does not apply to the HP 9-cell battery.
Battery
Primary battery
HP 9-cell (93 WHr) Li-Ion battery
HP 6-cell (47 WHr) Li-Ion battery
Battery Life
Configurations with
integrated Intel HD
Graphics
Configurations with
discrete ATI Mobility
Radeon HD 5470
graphics
Configurations with ATI
Mobility Radeon HD
6370
HP ProBook 4320s
9-cell battery
Up to 10 hours
Up to 8 hours and 45
minutes
Up to 8 hours
6-cell battery
Up to 5 hours
Up to 4 hours and 30
minutes
Up to 4 hours and 30
minutes
HP ProBook 4420s
9-cell battery
Up to 10 hours
Up to 8 hours and 15
minutes
Up to 8 hours and 45
minutes
6-cell battery
Up to 4 hours and 30
minutes
Up to 3 hours and 45
minutes
Up to 4 hours and 30
minutes
NOTE:
Battery life will vary depending on the product model, configuration, loaded applications, features,
use, wireless functionality and power management settings. The maximum capacity of the battery will
naturally decrease with time and usage. See MobileMark07 battery benchmark
www.bapco.com/products/mobilemark2007
for additional details.
System Standby Time
Up to 1 week
Power Conservation
Supports enhanced Intel SpeedStep technology (allows Battery Optimized Mode, Maximum Performance
Mode, or Automatic mode)
ATI PowerPlay technology
Hibernation
Standby
ACPI compliance
QuickSpecs
HP ProBook 4320s Notebook PC
HP ProBook 4420s Notebook PC
Standard Features (availability may vary by country)
DA - 13568 North America — Version 19 — September 29, 2011
Page 10