Chapter 4: Battery Installation and Removal
Release 8 STANDARD 1.1 August 2016 Touchstone TM804G Telephony Modem User Guide
© 2011-2016 ARRIS Enterprises LLC. All Rights Reserved. 17
Extended backup battery: provides up to 12 hours of backup time, depending on model
and usage. It has a strap between the battery guides. It may be light gray or black.
Extended Backup Battery
Refer to Extended Battery Installation and Replacement (page 19).
Maximum backup battery: provides up to 18 hours (6-cell) or 24 hours (8-cell) of backup
time, depending on model and usage. It replaces the battery door, and increases the
height of the Telephony Modem by about 5/8" (16 mm).
Maximum Backup Battery
Refer to Maximum Battery Installation and Replacement (page 21)
Your service provider may include a backup battery with your Telephony Modem. If you wish,
you can purchase an additional battery at http://shop.surfboard.com/. The website will list the
recommended battery type for your Telephony Modem.
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