3. (8 points) The advertising slogan for battery $A$ is “One is stronger than six”. This means that battery $A$ is more durable than other batteries. Let's assume that the power of one $A$ battery is 6 times that of a $B$ battery. There are two clocks with the same power consumption rate. Now, 2 $A$ batteries are installed in clock A, and 2 $B$ batteries are installed in clock B. As a result, clock B operates normally for 2 months before the batteries are depleted. How many more months will clock A operate normally compared to clock B? $\qquad$ months.
【Answer】Solution: According to the analysis, since both are operating normally and consuming power at the same rate, the time it takes for Clock A to deplete its battery is 6 times that of Clock B. Therefore, Clock A can operate normally for: $6 \times 2=12$ months, which is $12-2=10$ months longer than Clock B. The answer is: 10.