Power Monitoring And Charging; Power Management - Husky MP2500 Manual

32.1.2.6 Power loss
If the main batteries are removed or fail (ie the voltage falls below 2.6V-
2.7V), or the AC adaptor is turned off whilst batteries are below this level,
MP2500 will immediately turn off regardless of the current activities, and will
not turn on again until main power is restored.
When main power is restored, you should find that the memory contents
and setup are all intact and that any program which was running when
power was lost will continue executing. This is because MP2500 has a
backup battery fitted internally which is charged from the main power
source, and is sufficient to maintain RAM contents for a few days.
If main power is lost for longer than a few days, RAM data corruption may
occur, but files and programs will remain securely stored indefinitely on the
MP2500's non-volatile disk.

32.2 Power monitoring and charging

MP2500 provides a single power management mode. Charging can be
enabled or disabled by users or by an application.
To prevent users changing the charging setting via the HOT key, use INT
15H function 7BH (to disable the HOT key) or 7CH (to disable the Power
option).
Charging is disabled outside the temperature range 0°C to 40°C (32°F to
104°F).
For operating details, such as changing batteries and using the AC adaptor,
see Part 2.

32.2.1 Power Management

MP2500 monitors the battery voltage to detect the low power condition.
Charging is normally enabled at 160mA for NiCd, and 270 mA for NiMH, but
you can disable charging by using INT 15H function 8AH.
The charge rate falls to a trickle automatically after 20 hours have elapsed
from the time the charger was plugged in. This ensures that it is safe to
leave the unit on charge for long periods unattended.
Chapter 32: Using Power Handling 305