Juniper Systems Allegro DOS Manual - Manual (Page 34)

34 Allegro DOS Owner’s Manual
Temperature Ranges for Charging the NiMH Battery Pack
The Allegro’s NiMH batteries are charged most effi ciently at
temperatures ranging between 10° to 20° C (50° to 68° F) when the
AC power adapter is used. When charging the battery pack keep the
temperature of Allegro between 0° to 40° C (32° to 104° degrees F)
due to the nature of NiMH batteries. The chart below describes the
Allegro battery charging behavior at different temperatures.
Temp. Range Temp. Range
Degrees C Degrees F Charging Behavior
Recommended 10° to 20° 50° to 68° Most effi cient; batteries charge
Charge Range within 3 hours
Acceptable 0° to 30° 32° to 86° Batteries are charged within 4
Charge Range hours.
Too Cold < 0° < 32° The batteries must reach 0° C (14°
Range F) before they begin to charge.
Too Hot > 30° > 86° Battery charge cycle is complete in
Range 4-5 hours. If the batteries have
become too warm, they may only
reach a 90 to 95% charge capacity.
Try to charge the batteries within the recommended temperature
range. If you need to charge the batteries in temperatures exceeding
this range, you should purchase an extra battery for the most
effi cient operation of the Allegro.
Power Connector
A dedicated standard external DC power input connector is located
on the top of the Allegro. The connector is 5.5 x 2.1 mm, 10 to 20 V
DC. The AC power adapter and optional cigarette lighter power
adapter are inserted into this connector.
< Power Connector
Charging Accessories for NiMH Battery Packs
AC Power Adapter
Using the AC power adapter, the battery pack is recharged without
removing it from the Allegro.
Please note that you must use the adapter included with the Allegro
or one that is capable of supplying adequate current (12 V at 1 Amp).
Otherwise, the battery pack could be damaged.