With re pe a te d dis cha rge s a nd re cha rge s , the ba tte ry's ca pa city will
gra dua lly de cre a s e . In vie w of this it will be note d tha t a n ofte n us e d,
olde r ba tte ry will not ope ra te for a s long a s a ne w ba tte ry e ve n whe n
both a re fully cha rge d.
Ma x im iz in g b a t t e r y o p e r a t in g t im e
A ba tte ry's us e fulne s s de pe nds on how long it ca n s upply powe r on a
s ingle cha rge , while how long the cha rge la s ts in a ba tte ry de pe nds on:
P roce s s or s pe e d
S cre e n brightne s s
S ys te m S le e p Mode
S ys te m Hibe rna tion Mode
Dis pla y powe r off pe riod
Ha rd Dis k Drive powe r off pe riod
How ofte n a nd for how long you us e the Ha rd Dis k Drive a nd e xte rna l
dis k drive s , for e xa mple , optica l dis c.
How much cha rge the ba tte ry conta ine d to be gin with.
How you us e optiona l de vice s , s uch a s a US B de vice , to which the
ba tte ry s upplie s powe r.
Whe the r you e na ble S le e p Mode , which ca n cons e rve ba tte ry powe r if
you a re fre que ntly turning the compute r off a nd on.
Whe re you s tore your progra ms a nd da ta .
Whe the r you clos e the dis pla y pa ne l whe n you a re not us ing the
ke yboa rd - clos ing the dis pla y s a ve s powe r.
The e nvironme nta l te mpe ra ture - ope ra ting time de cre a s e s a t low
te mpe ra ture s .
Whe the r you e na ble S le e p a nd Cha rge function.
B a t t e r ie s e x h a u s t e d t im e
Whe n you turn off the powe r of your compute r with ba tte rie s fully cha rge d,
the ba tte rie s will be e xha us te d within the following a pproxima te pe riod.
Ba tte ry typ e
S le e p Mo d e
S h u t Do wn Mo d e
Ba tte ry pa ck (48Wh, 6
ce ll)
a bout 4 da ys
a bout 44 da ys
Ba tte ry pa ck (47Wh, 8
ce ll)
a bout 3 da ys
a bout 44 da ys
E x t e n d in g b a t t e r y life
To ma ximize the life of your ba tte ry pa cks :
Us e r's Ma nua l
4-31
