Juniper Systems Allegro DOS Manual - Manual (Page 33)

Allegro DOS Owner’s Manual 33
If you purchase a battery pack from another vendor, note what the
capacity is. For optimum performance, it is best to use battery packs
with a 3000 to 4000 mAh capacity. The higher the capacity of the
battery pack, the longer it holds a charge. However, battery packs
with a capacity over 4000 mAh may not charge fully in the Allegro.
As a battery pack ages, it does not operate as long on a charge as it
did when it was new. The capacity could be reduced by as much as
50% at the end of its useful life. Over time, the capacity setting for an
individual battery pack may be adjusted downward to account for
age.
Details about battery life, recharging the battery pack, the battery
status LED indicators, power management features, and removing
and inserting battery packs are located in this chapter of the manual.
Battery Life
Depending on the application you are running on the Allegro, the
batteries can last from 5 to 30 hours between charges (NiMH) or
replacement (alkaline cells), as shown below:
Battery Pack Capacity Typical Operating Time
NiMH 3,800 mA hours 12 to 20 hours
Alkaline 1,600 mA hours 5 to 8 hours
The operating times stated above are based on the use of a typical
application where:
Allegro performance level is set to medium
Power Manager is on
Data are being entered manually on the keyboard
No external devices are powered by the Allegro
Backlight is used 10% of the time
Processing time is 20%
Recharging the NiMH Battery Pack
For applications where the Allegro is used for several hours each
day, the NiMH batteries can be charged daily. The Allegro’s built-in
intelligent charging circuit manages the charging of the batteries and
prevents them from being overcharged. For less frequent use, the
batteries should be discharged below 80% before they are recharged
for maximum battery life.
You should always be aware of the status of the main batteries before
you go out into the fi eld to collect data. The batteries may need to be
recharged before you go. You need to take into account how much
battery life is left and the amount of time required to charge the pack.