C theme battery remaining discharge time prediction
As a power source, lead-acid batteries are widely used in industry, military and daily life. During the discharge of lead-acid battery with constant current intensity, the voltage decreases monotonously with the discharge time until it reaches the rated minimUm protection voltage (um, 9V in this topic). The relationship between voltage and time is called the discharge curve from full charge. How long the battery can supply power under the current load (that is, the time remaining to discharge to Um under the current intensity) is a question that must be answered in use. After the battery is used or placed for a long time, the state of charge will decay after it is fully charged.