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Battery Back

January 31st, 2004

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My cable modem has a battery back-up that lasts 2 hours.How can I best extend that (for telephone operation)?

I have a portable '12 v. jumper pack-portable' with a cigarette style power tap. Would it be most efficient to utilize a step down transformer that taps into the back-up battery connections vs. a 12v. d.c. to 120v. a.c. adapter?

Get a UPS (uninterpretable power supply), plug the cable modem into it.

You can buy one at Best Buy for ~$50.00

I've got a UPS on every computer in my house.

Find Battery Back On eBay Below:

APC Back UPS 600VA UPS Battery Backup  Surge Protector with USB Charging Por
APC Back UPS 600VA UPS Battery Backup Surge Protector with USB Charging Por
$77.67
NEW Tripp Lite ECO750UPS UPS 750VA 450W Eco Green Battery Back Up Compact 120V
NEW Tripp Lite ECO750UPS UPS 750VA 450W Eco Green Battery Back Up Compact 120V
$125.89
NEW Tripp Lite INTERNET550U UPS 550VA 300W Desktop Battery Back Up Compact 120V
NEW Tripp Lite INTERNET550U UPS 550VA 300W Desktop Battery Back Up Compact 120V
$91.76
Tripp Lite 900VA UPS Battery Back Up 475W Tower LCD Display AVR USB
Tripp Lite 900VA UPS Battery Back Up 475W Tower LCD Display AVR USB
$140.15
Battery Back Cover for Apple Mac Wireless Bluetooth Magic Mouse A1296 MB829LL A
Battery Back Cover for Apple Mac Wireless Bluetooth Magic Mouse A1296 MB829LL A
$2.82
APC Back UPS BK650M Battery Not Included
APC Back UPS BK650M Battery Not Included
$29.90
Tripp Lite UPS 600VA 300W Desktop Battery Back Up Compact 120V USB RJ11 PC
Tripp Lite UPS 600VA 300W Desktop Battery Back Up Compact 120V USB RJ11 PC
$111.87
Tripp Lite UPS 1000VA 500W Battery Back Up Tower AVR 120V USB RJ45 OMNIVS1000
Tripp Lite UPS 1000VA 500W Battery Back Up Tower AVR 120V USB RJ45 OMNIVS1000
$193.87
Tripp Lite UPS 850VA 425W Eco Green Battery Back Up LCD 120V USB RJ11 PC 12 Outl
Tripp Lite UPS 850VA 425W Eco Green Battery Back Up LCD 120V USB RJ11 PC 12 Outl
$144.87
Tripp Lite UPS 350VA 180W Desktop PC MAC Battery Back Up Compact 120V 6 Outlet
Tripp Lite UPS 350VA 180W Desktop PC MAC Battery Back Up Compact 120V 6 Outlet
$80.87
Tripp Lite UPS 550VA 300W Desktop Battery Back Up Compact 120V USB RJ11 PC
Tripp Lite UPS 550VA 300W Desktop Battery Back Up Compact 120V USB RJ11 PC
$108.87
APC Back UPS XS 1300VA BX1300G Compatible Replacement Battery Pack
APC Back UPS XS 1300VA BX1300G Compatible Replacement Battery Pack
$69.99
APC Back UPS Pro 1300VA BR1300G Compatible Replacement Battery Pack
APC Back UPS Pro 1300VA BR1300G Compatible Replacement Battery Pack
$69.99
APC BR1000MS 1000VA Back UPS Pro Sinewave UPS Battery Backup  Surge Protector
APC BR1000MS 1000VA Back UPS Pro Sinewave UPS Battery Backup Surge Protector
$216.87
APC Back UPS 425VA Battery Back Up System Black
APC Back UPS 425VA Battery Back Up System Black
$83.87
CyberPower 650VA Battery Back Up System Black
CyberPower 650VA Battery Back Up System Black
$92.87
APC Back UPS 600VA UPS Battery Backup  Surge Protector w USB Charging Port
APC Back UPS 600VA UPS Battery Backup Surge Protector w USB Charging Port
$73.29
APC BACK UPS PRO 1300 Battery Backup BR1300G 10 Outlet NO BATTERY HARNESS
APC BACK UPS PRO 1300 Battery Backup BR1300G 10 Outlet NO BATTERY HARNESS
$45.00
APC Surge Protector Back up Battery Uninterruptible Power Supply Router Computer
APC Surge Protector Back up Battery Uninterruptible Power Supply Router Computer
$57.74
APC BX1500LCD Back UPS XS 1500 Power Supply Surge Protector No Batteries
APC BX1500LCD Back UPS XS 1500 Power Supply Surge Protector No Batteries
$39.99
APC Back UPS ES 350 6 Outlet BE350U Power Supply  Surge Protector No Battery
APC Back UPS ES 350 6 Outlet BE350U Power Supply Surge Protector No Battery
$14.99
Metal Rear Housing Back Case Battery Door Cover For iPad Gen 2 3 4 version Wifi
Metal Rear Housing Back Case Battery Door Cover For iPad Gen 2 3 4 version Wifi
$20.00
APC BACK UPS RS XS BR24BP REPLACEMENT BATTERY SET
APC BACK UPS RS XS BR24BP REPLACEMENT BATTERY SET
$99.99
IBM 41Y0679 Battery Back Up Unit for DS4200 and DS4700 zq
IBM 41Y0679 Battery Back Up Unit for DS4200 and DS4700 zq
$215.00
APC BACK UPS XS 800VA XS800 REPLACEMENT BATTERY PACK
APC BACK UPS XS 800VA XS800 REPLACEMENT BATTERY PACK
$69.99
Tripp Lite 550VA 300W UPS Battery Back Up Tower AVR SMART550USB 120V USB RJ11
Tripp Lite 550VA 300W UPS Battery Back Up Tower AVR SMART550USB 120V USB RJ11
$79.00
APC BACK UPS XS 1200VA BX1200 REPLACEMENT BATTERY PACK
APC BACK UPS XS 1200VA BX1200 REPLACEMENT BATTERY PACK
$69.99
OEM Samsung Mobile Hotspot SCH LC11 4G LTE Standard Battery Door Back Cover
OEM Samsung Mobile Hotspot SCH LC11 4G LTE Standard Battery Door Back Cover
$6.99
APC Back UPS Pro 1500VA BR24BPG Compatible Replacement Battery Set
APC Back UPS Pro 1500VA BR24BPG Compatible Replacement Battery Set
$119.99
MacBook Pro 2012 Retina A1398 15 Inch Back Case Battery Keyboard Sync Etc
MacBook Pro 2012 Retina A1398 15 Inch Back Case Battery Keyboard Sync Etc
$99.00
APC Back UPS NS 1080 Computer  Server Battery Back Up  No battery Pack
APC Back UPS NS 1080 Computer Server Battery Back Up No battery Pack
$54.99
APC Back UPS ES 650 8 Outlet 650VA 390W Battery Backup  Surge Protector BE650R
APC Back UPS ES 650 8 Outlet 650VA 390W Battery Backup Surge Protector BE650R
$65.00
Original Housing Battery Back Rear Cover Apple iPad Air 1st Gen A1474 Space Grey
Original Housing Battery Back Rear Cover Apple iPad Air 1st Gen A1474 Space Grey
$38.00
APC Back UPS 600VA UPS Battery Backup  Surge Protector with USB Charging New
APC Back UPS 600VA UPS Battery Backup Surge Protector with USB Charging New
$63.14
APC BE550G Battery Back Up Surge Protector wall mount
APC BE550G Battery Back Up Surge Protector wall mount
$89.99
Asus P00I 97 Back Cover Housing w Battery 385V SAME DAY SHIPPING FROM CA
Asus P00I 97 Back Cover Housing w Battery 385V SAME DAY SHIPPING FROM CA
$28.95
apc battery back up
apc battery back up
$75.00
69Y292669Y292769Y2905 IBM DS3512 DS3524 DS3500 DS3700 Back Up Battery Module
69Y292669Y292769Y2905 IBM DS3512 DS3524 DS3500 DS3700 Back Up Battery Module
$114.99
Belkin Battery Back Up REV B BU3DCoo112V
Belkin Battery Back Up REV B BU3DCoo112V
$19.00

Recently Purchased Battery Back:


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