According to Techlib, battery life is calculated by dividing the capacity by the actual load current. The capacity of a 9-volt battery is 500 milliampere hours, and its load current is 15 milliamperes. Therefore, it has a 33-hour battery life.
Lower drain currents lead to longer battery life, and the 9-volt battery beats the AA, 6-volt lantern, D and C batteries in this category. In contrast, the AAA battery has the longest battery life at 100 hours. Techlib also notes that silver-zinc batteries have 85 percent of the capacity of ordinary alkaline batteries of the same size, while lead-acid batteries have 35 percent and nickel-cadmium batteries have 30 percent.Learn More
Using a multimeter, insert one of the probes from the multimeter into one of the parallel slots in the 240-volt outlet and insert the other probe into the other parallel slot to test if the outlet is indeed carrying 240 volts. If the voltage does not add up to 240 volts, check the slots individually to see which one is carrying less voltage.Full Answer >
Installing a new dryer circuit requires installing a 10-gage cable containing four wires. The four wires provide two hot wires, a neutral wire and a separate ground wire. Other materials include the new dryer outlet, electrical box rated for a dryer and a 30 amp two-pole circuit breaker. The tools required include wire cutters, wire strippers and screwdrivers.Full Answer >
To extend the battery life of a laptop, limit the amount of power your laptop is currently consuming. You can do this by reducing the number of processes that your computer is running and avoiding heavy processes that require high energy usage.Full Answer >
The white wire is the common or neutral wire in a 100-volt service, but the wire can also be gray in color. A white or gray wire can only be connected to another white or gray wire. Knowing the color code is essential for setting up the correct configuration of an electrical system and for safety.Full Answer >