User guide
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M490s notebook
21
22
23
24
25
26
27
28
29
30
Heat
output
•
65
W
(222
Btu/hr)
or
90
W
(307
Btu/hr)
maximum
heat
output
(depending
on
the
model)
P
ower
sour
ce
(ac
power
adapter)
•
Sine-wave
input
at
50
to
60
Hz
•
Input
rating
of
the
ac
power
adapter:
100
t
o
240
V
ac,
50
t
o
60
Hz
Battery
pack
•
Lithium-ion
(Li-ion)
batt
ery
pack
8
User
Guide
1
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20
21
22
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24
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