Phonetics IMS-4000 - Manual (Page 29)

Chapter 1: Installation
29
Battery Maintenance
The IMS-4000 Host includes an internal UPS that automatically switches to battery backup in the
event of an AC power failure. The battery in the IMS-4000 Host is a 12V 2.9AH gel cell. This bat-
tery will keep the unit operating for approximately 3.5 hours when fully charged and under normal
operating conditions.
Service life
Over time and with periodic use, the battery will begin to lose its capacity, resulting in less overall
backup time. Under normal operating conditions, three or four years of dependable service life can
be expected or between 200 and 1000 charge/discharge cycles, depending on the average depth
of discharge. Eventually, battery replacement will be required to maintain a dependable level of
service.
Replacing the Battery
The battery in the Host can be replaced by following the instructions listed below. Be sure to read
all safety messages and follow the instructions in order as listed. Several tools will be required to
change the battery:
• small flathead screwdriver
• needle-nose pliers
•
1 ⁄
4
" nut driver
CAUTION: REPLACE BATTERY ONLY WITH A 12V 2.9AH GEL CELL BATTERY.
WARNING: DISCONNECT THE AC POWER CORD FROM THE BACK OF THE UNIT.
THERE IS A RISK OF ELECTRICAL SHOCK UNLESS YOU
DISCONNECT THE CORD.
Figure 6: Battery location
Step 1) Locate the power switch on the rear of the unit and turn the IMS-4000 off.
Step 2) Disconnect the power cord from the back of the unit.
Step 3) Remove the IMS-4000 from the rack.