Amazon has a variety of backup power supplies available. Depending on what you need it for, you can find the Belkin Backup Unit for 65$ new or $30 used.
The UPS electric backup stores or backup power whenever there is a sudden blackout. It stands for the uninterruptible Power Supply.
Almost all digital electronics use a AC to DC power supply. Digital electronics cannot handle AC. all electronics device having battery powered are using DC power supply http://www.wzmicro.com
One can get a backup power supply from the following sources: Special List Power, DC Response, Newegg, Office Max, Wholesale Solar, Cyber Power, Eco Power Supplies.
Whatever takes over when the main power supply fails.
IPS is instant power supply that is a backup system that start when main energy not available.
You can purchase a 500W Modular Power Supply online from stores such as Directron. Alternatively, you can purchase a 500W Modular Power Supply from retailers such as Amazon and Newegg.
Electronics circuits and devices are operate on D.C power supply. But the source of D.C power are mostly batteries and rectifiers. Batteries are really deliver pure D.C supply but they are bulkier and big in size. So we use rectifier circuit for operating Electronic devices. sometimes where backup of supply is needed there both source may present for example in laptops there batteries and rectifier(adapter) both are used.
One can purchase a Compaq power supply replacement at various retailers. One can purchase a Compaq power supply replacement online at Amazon and the HP Official Store.
Uninterruptible supply
A switching power supply adapter from Dee Van Electronics.
if you are reffering to Vcc than it means- It is the positive power supply used for TTL gates it is nothing but simple dc power supply. if we use CMOS than we use Vdd for indicating power supply these are method for indicating power supply.
VHF Power Amplifiers can run you anywhere from $100 to $150 dollars. You can purchase them from any electronics store. Try Friendly's Electronics on Burgess Avenue for great prices.