This item is used, but has been tested to function perfectly.
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Battery backups provide an uninterruptible power supply (UPS) to keep critical systems up and running in the event of a power loss. The Belkin Residential Gateway (RG) Battery Backup REV B, BU3DC001-12V has been designed to maintain your AT&T U-verse® Residential Gateway and your AT&T U-verse® Voice service should a short disruption to your commercial power service occurs.
it uses a common 12v DC barrel plug, (See pictures) so it's suitable to power ANY 12v device that uses the same power jack. This type of power jack is very common with most gateways/routers on the market today. This device is able to maintain power to a device for up to 4 hours run time on the battery alone. Very useful if you have your home phones provided by your cable company.
Can be used as a battery charger as well.
Input Voltage Range: 0 to 140 VAC
Input Frequency: 50/60 Hz
Nominal Output Voltage: 12 VDC
Max Power: 36 W
Alarms: Visual and Audible
Operating Temperature: 32 to 113 degrees F (0 to 45 degrees Celsius)
Typical Battery Recharge Time: 18 hours for a new and fully depleted battery (at normal indoor temperature)
Typical Backup Time: four (4) hours (actual results will vary depending on battery age, usage patterns and environmental conditions)