Owner's manual

38 Allegro DOS Owner’s Manual
When moving from a cold environment to a warm one the battery
charge LED indicators may move up instead of down. This happens
because in cold temperatures alkaline batteries have less charge
capacity than in warm temperatures and this is refl ected in the
voltage output.
Battery Status LED Indicators
There are fi ve LEDs. Depending on which LED is lit, starting left and
moving right, the battery charge remaining is as follows:
LED Status Indicator Battery Charge Remaining
1 Blinking Low Voltage 0 to 10%
1 Steady Light Charge Flow 10% to 20%
2 “ “ 20 to 40%
3 “ “ 40 to 60%
4 “ “ 60% to 80%
5 “ “ 80% to 100%
❖ Important Note: The LED indicators are meant to give only an
approximate indication of battery charge remaining, not an exact reading.
When the battery charge drops to 10%, the voltage begins to drop
off rapidly. When the Allegro detects this low battery condition, the
battery status LED indicator farthest to the left begins to blink to let
you know it is time to recharge or replace the batteries. You have
from ten minutes to one hour (depending upon power consumption
rate) to save your data and exit your program.
When the battery pack voltage drops suffi ciently, the Allegro
automatically goes into suspend mode. Charge or replace the
batteries as soon as possible. The battery pack has enough charge
left to retain the system RAM for a short period of time, at which
point the Allegro completely powers down to prevent damage to
the batteries. If this happens, the Allegro reboots after you charge or
replace the batteries. Any data that were not saved to disk are lost.
Charging Indicator
When the rechargeable batteries are being charged via the AC power
adapter or the vehicle cigarette lighter power adapter, the LED
underneath the charging indicator is lit. When the batteries are fully
charged, the LED turns off. Note that when the LED turns off, the
batteries continue to receive a trickle charge.