These are typically part of an AT&T U-Verse system and allow the telephone to work when there's a local power failure.
Here is a Belkin web page showing this unit: Sku BU3DC001-12V
I may have a number of applications for these:
Panasonic KX T824 telephone system
Reading light on bed headboard
This is a 12 Volt 7.2 Amp Hour Gel Cell battery in a case that includes a charger with float capability and also has system monitoring functions including a warning alarm. It amounts to an uninterruptible 12 Volt power supply.
Supposed to supply enough power to support one phone and U-Verse telephone only service for 4 hours of power failure.
The BC7-12 by B.B. Battery has a listed size of 151mm (5.94") x 65mm (2.56") x 94mm (3.94") The measurements (Fig 5 below) are slightly smaller.
The Power Sonic PS-1270-F2 (data sheet) might be a good replacement. Note they supply discharge curves for various conditions.
Fig 2 Back cover opened showing end of battery and
AC on/off switch.
2-prong AC plug for 120 VAC input.
5.5mm 12 V Power Plug (center: +)
Fig 3 Unit on left unplugged showing "on Battery:
Unit on right plugged in showing "on AC"
Fig 4 Showing Self Test result "Fault - Replace Battery"
Note done shortly while first charging so probably not valid.
After charging overnight both units passed the battery test.
Self test runs automatically every 21 days. To force test:
Cycle speaker switch a couple of times. "Testing Battery" green LED blinks for about 5 minutes during test.
Fig 5 Battery
box (ex terminals) 5-7/8" x 3-5/8" x 2-1/2"
1/4" quick connect "Faston" tab terminals (T2 std. terminal)
Probably a PS-1270
7656120 Power supply system comprising rechargeable battery pack and attachment apparatus, Thorben Neu John, Wadsworth Ian Sinclair Jeff Meyers Oliver Duncan Seil Barry P. Sween , Belkin International Inc, 2006-03-15 - for MP3 device, but may contain common features.
7397654 Uninterruptible power supply and method of manufacturing same, Kenneth Mori, 2008-07-08 -
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