mA stands for milliAmpere. milli- means 1/1000th.
So 1mA = 0.001 A
400 mA = 0.400 A
.5 amps equals 500 ma, which is much larger than .400 ma.If you meant between .5 amps and 400 ma, then again, .5 amps equals 500 ma, which is larger than 400 ma by a factor of 100 ma.
Verizon Wireless
Yes, you can use a 12-volt power source with a 0.5A capacity to power a 12-volt device that requires 400 mA. The power source provides sufficient current since 0.5A (500 mA) is greater than the device's requirement of 400 mA. Just ensure that the voltage remains stable at 12 volts, as that matches the device's specifications.
A digital clock doesn't have watts it consumes watts. The wattage consumed by the clock is in the neighborhood of W = A x V, W = 400 ma (.400) x 9 = 3.6 watts.
400 miles due east of Boston, MA.
The address of the Plymouth 400 Inc is: 134 Court St, Plymouth, MA 02360-8728
Zinc-carbon AA =400-900 mah Alkaline AA = 1700-3000 mah :: I believe the above answer to be misleading/misguiding, the question is "How much mA does a single AA battery have?" not how many mAh. in mA a single AA batter will have about 3.6mA to 4.0mA it is important to distinguish mA from mAh, if one were to connect a device that required 4.0mA to a power source of 400-900mA this would likely destroy the device. mAh deals more with how long the battery life lasts.
400
400!
400.
.11 A = 110 mA
400 m = 400/0.3048 feet