Always the perennial third in the national ratings, ABC News president Roone Arledge reformatted the program, relaunching it as World News Tonight on July 10, 1978. Reynolds, who was demoted when the network hired Reasoner, returned as lead anchor, reporting from ABC News' Washington, D.C. bureau.
The correct unit for measuring energy capacity of a battery product is called watt-hours. Watt-hours signifies that a battery can supply an amount of watts for an hour. For example, a 60 watt-hour battery can power a 60 watt light bulb for an hour. The same battery would run a 5W phone for 12 hours and power a 1W LED light bulb for 60 hours.
If the connected load required 10 amps then the wattage load from the battery would be 12 x 10 = 120 watts. Batteries are rated in amp/hours and not watts. This means that if the battery is rated at 500 amp hours it could produce 1 amp for 500 hours, or in our case 10 amps for 50 hours. 12 v battery could be specified as 14 A-h or 14 ampere-hours, which means 14 amps for 1 hour, or 1.4 amps for 10 hours. In â¦ other words it produces less current for a longer time. A 9 watt bulb takes Â¾ amp in theory, so it should last 14/Â¾ hours on that battery, that is 14 x 4 / 3 hours, 18 hours.