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LITHIUM-ION BATTERY REPLACEMENT ACTION

1.

  Insert a finger into the latch opening, press down and pull back on the latch holding the  

battery door (on the bottom of the Telephony Modem). Pull the door toward you. Set the 
door aside in a safe place.

3.

  Push the battery pack into the bay until it latches into place. The following diagram shows a 

Telephony Modem with a 4.4 Ah lithium-ion battery pack installed. If you are taking the  
battery out of the unit, make sure to use the battery pull strap to dislodge the battery.

2.

  Hold the battery pack so that the guides on the battery align with the slots on the Telephony 

Modem and slide the battery into the bay. The diagram below shows the proper orientation. 
Batteries will not insert completely into the Telephony Modem if not oriented correctly.

4.

  Replace the door. To do so, place the tabs of the battery door into the slot on the  

Telephony Modem battery compartment. Rotate the door toward the unit until the  
latch snaps back into place.

latch end

battery guide

battery pull strap

battery slot

receiver slots

hinge tabs

Note:

 The Telephony Modem will not begin operating until you apply AC power.

Note:

 Since lithium-ion batteries contain precious material, there may be some benefit in 

recycling. Please dispose of the battery responsibly and in accordance with local ordinances.

Enclosed is the battery that you requested for your voice modem.   

The battery is easy to install as outlined in the instructions below.  

INsTALLATION ANd REPLACEMENT

battery

ARRIs  

TM502G

The 4.4 Ah lithium-ion battery 
pack can be inserted into the 
Telephony Modem. Use this 
procedure to install and to 
replace the backup batteries.

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