Battery Performance - Welch Allyn Spot Vital Signs 4400 Service Manual

Service manual
to perform service tasks. Restricting access prevents the service tool from being used to make
unauthorized changes on a connected device.
Perform functional verification and calibration. The service tool can check any device
•
requiring calibration and, if necessary, calibrate the device to match the design specifications.
This feature is not supported for all products and requires the service tool, Gold edition, for
each supported product.
• Recover devices. In the rare case where a device can no longer boot because of corrupted
firmware, the service tool can connect the device to Welch Allyn Technical Support to reinstall
the firmware.
• Extensible. The service tool software accepts new plug-ins to support future Welch Allyn
products.
Some of these features are enabled for any user (Standard unlicensed edition). Others require
special user account privileges or a Welch Allyn service contract (Gold edition). If you require gold-
level support for a Welch Allyn product, please contact Welch Allyn technical support.

Battery performance

About the batteries
The device uses a rechargeable, 2-cell, Lithium-ion smart battery. Internal circuitry enables the
battery to report its condition to the device. The device displays the battery status via the LED
power indicator, icons on the screen, and status messages appearing in the Device Status area of
the display.
The battery status indicator on the device displays the remaining charge. Battery information may
be collected using the service tool.
New batteries are shipped from the manufacturer with a 30 percent charge to extend shelf life.
After installing a new battery in the device, you must plug the device into AC power to wake up the
battery. If AC power is not applied to the device, the new battery appears discharged.
The Device Status area displays a low-battery notification when 30 minutes of power remain and
again when 5 minutes of power remain. The 30-minute notification is dismissable by the user, and
all functions of the device remain available. The 5-minute notification is not dismissable, and
prevents acquiring vitals measurements or performing any other function until the device is
plugged in to AC power.
If AC power is not applied to the device after it triggers the 5-minute notification, the device will
shut down at or close to 0 minutes of remaining battery charge.
Battery charging is provided by the device's internal power supply. The power reserve threshold is
determined by the device's software.
For a complete list of battery specifications, see the device's Instructions for use.
Best practices
The following practices help to extend the life of the battery and the device.
WARNING Safety risk. When handling and storing Lithium-ion batteries: Avoid
mechanical or electrical abuse. Batteries may explode or cause burns if
disassembled, crushed, or exposed to fire or high temperatures. Do not short or
install with incorrect polarity.
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