Quick Installation Guide

~1~ ~2~
PRECAUTIONS
GMC08 PACKAGE CONTENTS
1x 12V,2A
Power Adapter
1x GMC08
1x Quick Installation
Guide
EN
• Do not attempt to open, disassemble, or modify the device.
• Do not use a third party power adapter.
• Do not expose the device to temperatures outside the
range of 0°C to 55°C (32°F to 131°F) in operation and
-10°C to 60°C (14°F to 140°F) in storage.
• Do not expose the GMC08 at environments outside of the
humidity range of 10-90% RH (non-condensing).
• Do not charge or discharge third party batteries that are
not specied by Grandstream.
• Do not short circuit electrodes.
OVERVIEW
GMC08 is Grandstream’s battery charging pack for its mobile
telephony products, including the WP820. It features 8 inde-
pendent slots to fully charge or discharge multiple batteries
simultaneously.
For added exibility, the GMC08 comes with three charging
capacities for air shipment, storage capacity control and
long endurance. It offers reliable performance and efciency
thanks to built-in over-voltage, over-charge, over-current, and
short-circuit management as well as leak protection.
12V
CHARGING/DISCHARGING BATTERIES WITH
GMC08
1. Connect one end of the 12V, 2A DC output plug to the
power jack on the device and the other end to an electri-
cal outlet.
2. Insert the batteries with the electrodes in the top right
corner.
3. Slide the battery capacity switch on the top right of the
device to the desired capacity. The device will start charg-
ing/discharging the battery until the level reaches the se-
lected capactiy.
12V
Battery Capacity
Switch
GMC08 LED STATUS
LED Description
Red Flashing Charging
Green Flashing Discharging
Green Solid Charging or discharging done
Red Solid Charging or discharging error (high
temperature or extreme temperature or
battery contact error)
LED OFF No battery detected or battery incom-
patible