Power Source
RTCs often have an alternate source of power, so they can continue to keep time while the primary source of power is off or unavailable. This alternate source of power is normally a lithium battery in older systems, but some newer systems use a supercapacitor, because they are rechargeable and can be soldered. The alternate power source can also supply power to battery backed RAM.
Read more about this topic: Real-time Clock
Famous quotes containing the words power and/or source:
“Rocked in the cradle of the deep
I lay me down in peace to sleep;
Secure I rest upon the wave,
For Thou, O Lord! hast power to save.”
—Emma Hart Willard (1787–1870)
“As a means of contrast with the sublime, the grotesque is, in our view, the richest source that nature can offer.”
—Victor Hugo (1802–1885)