Power Supply
Models with discrete graphics:
External 90-watt Smart AC adapter
Models with integrated graphics:
External 65-watt Smart AC adapter
Power cord included is 6-foot (1.8 meter).
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 9-cell primary battery, the 12-cell Ultra-Capacity batteries, or the HP Long
Life Battery.
Battery
Primary battery
9-cell (93 WHr) Li-Ion battery
6-cell (55 WHr) Li-Ion battery
6-cell (47 WHr) Li-Ion battery
Optional HP Long Life
Battery*
3-cell (47 WHr) high capacity Li-Ion battery
Optional HP Extended Life
Battery
8-cell (52 WHr) high capacity Li-Ion battery
Optional HP Ultra-
Capacity Battery
12-cell (95 WHr) high capacity Li-Ion battery
Battery Life
Integrated Graphics 9-cell (93 WHr)
Primary
6-cell (55 WHr)
Primary
6-cell (47 WHr)
Primary
HP Long Life
Battery (47 WHr)*
Primary battery
Up to 10 hours
30 minutes
Up to 6 hours
15 minutes
Up to 5 hours
30 minutes
**
Primary battery
and optional HP
Extended Life
Battery
Up to 17 hours
Up to 13 hours
**
**
Primary battery
and optional HP
Ultra-Capacity
Battery
Up to 21 hours
Up to 17 hours
**
**
Discrete Graphics 9-cell (93 WHr)
Primary
6-cell (55 WHr)
Primary
6-cell (47 WHr)
Primary
HP Long Life
Battery (47 WHr)*
Primary battery
Up to 7 hours
30 minutes
Up to 4 hours
30 minutes
Up to 3 hours
45 minutes
**
Primary battery
and optional HP
Extended Life
Battery
Up to 12 hours
30 minutes
Up to 9 hours
15 minutes
**
**
QuickSpecs
HP ProBook 6540b Notebook PC
Standard Features
DA - 13465 North America — Version 13 — September 27, 2010
Page 11