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Internal Backup Battery
Located inside the terminal is a 3.6 Volt nickel metal hydride (NiMH) backup battery. The backup battery
prevents the terminal from being reset if you need to replace the main battery pack. It retains RAM data
during the battery pack exchange. A fully charged backup battery provides 5 minutes of data backup
time.
Note: A fully charged backup battery preserves RTC content for approximately 168 hours when the terminal is in
suspend mode and the main battery is not installed or completely depleted of charge.
If at any time the backup battery becomes fully discharged of power (e.g., the terminal is left without the
main battery pack for more than 5 minutes), the terminal resets when power is supplied. All files are
retained, but you may need to restart any running applications. In addition, a fully discharged backup
battery requires a minimum of 24 hours of charging time to reach a full charge.
Note: Data and programs stored in Flash memory are not lost even if the internal backup battery fails.
Charging
The internal backup battery is powered by the main battery pack. Therefore, charging the internal battery
requires a charged main battery pack be installed in the terminal and the terminal be connected to a
charging device.
The internal backup battery must be fully charged before using the terminal for the first time. Honeywell
recommends charging the Dolphin terminal for at least 24 hours prior to initial use to ensure the internal
backup battery is fully charged. After that, if the internal backup battery becomes fully discharged of
power, it requires a minimum of 24 hours of charging time to function normally.
Guidelines for Use
Follow these guidelines to maximize the life of the internal backup battery:
• Keep a charged battery pack in the terminal; the backup battery prematurely discharges if there is not
at least a partially charged battery in the terminal.
• Keep the terminal connected to power when the terminal is not in use.
Managing Battery Power
Letting the backup battery become fully discharged causes the terminal to lose all data in RAM. Honey-
well recommends, you keep a charged battery pack in the terminal at all times to help prevent data loss.
The internal battery discharges prematurely if there is not at least a partially charged battery in the termi-
nal. When you remove a battery pack, insert another charged battery pack in the terminal immediately.
Critical and Low Battery Points
When the terminal is running on battery power (as opposed to external power), warnings are displayed
when the battery reaches critical and low battery points.
System Resets
See Resetting the Terminal on page 2-10.