Juniper Systems Allegro DOS Manual - Manual (Page 41)

Hardware Features Page 2-23
Once the battery pack is fully charged, the gauging is automatically
set to 100% and the battery LED indicators accurately reflect the
battery charge.
Setting the Battery Capacity
The charge capacity field should be set to the charge capacity of the
newly installed battery pack in milliamp-hours (mAh). The charge
capacity of the NiMH batteries we have provided for the Allegro are as
follows:
Gold Peak ™ (GP) VR151 3800 mAh
Empire ™ 3500 mAh
Duracell ™ DR9 3000 mAh
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.
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 section of the manual.
Battery Life
Depending on your application, the batteries can last from five 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