Dell Precision M4400 (Mid 2008) - Manual (Page 29)

Specifications
29
Watt hours:
6-cell primary battery 56 Whr, 2.6 Ahr
9-cell high capacity battery 85 Whr, 2.6 Ahr (optional, in battery bay)
NOTE:
Battery operating time varies depending on operating conditions and can be
significantly reduced under certain power-intensive conditions.
Charge time (approximate):
Computer off 1 hour to 80% capacity
Operating time Battery operating time varies depending on
operating conditions and can be significantly
reduced under certain power-intensive
conditions.
Life span (approximate) up to 500 recharge cycles
Temperature range:
Operating 0° to 40°C (32° to 104°F)
Storage –10° to 65°C (14° to 149°F)
Coin-cell battery replaceable
AC Adapter
Types 65-W travel adapter
90-W AC adapter
130-W Dell™ adapter PA-4E
Input voltage 100–240 VAC
Output voltage 19.5 VDC
Frequency 50–60 Hz
65-W travel adapter
Input current
Output current
1.5 A
3.34 A
90-W AC adapter
Input current
Output current
1.5 A
4.62 A
Battery (continued)