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Calibrating the Battery
3-8
This Extensa system uses either a Duracell
Nickel-Metal-Hydride (NiMH) DR35 or Lithium-
Ion (Li-Ion) DR201 rechargeable battery. Your
new Duracell smart batteries keep extremely
accurate track of the battery capacity. However,
all rechargeable batteries lose capacity over time
due to different charging and discharging
conditions, as well as general wear and usage.
In order to keep accurate track of the true
capacity, the battery must be calibrated every
once in awhile.
!
Caution: If the battery loses track of the true
capacity, it will not correctly predict low
battery conditions and can cause the system
to shut off prematurely and without warning.
The battery itself keeps track of when it needs to
be calibrated. The computer will post a warning
when you boot up the system when it is time to
re-calibrate. To calibrate the battery, you must
first fully charge the battery, then fully discharge
the battery.
Use the following instructions to calibrate your
battery.
1. Charge the battery by leaving the battery in
the computer and having the AC adapter
plugged into the computer. The battery is
fully charged when the charging LED turns
off.
2. Disconnect the AC adapter from the
computer.