User blog comment:B214/Question and Answers 6/@comment-208.80.28.197-20180131004220/@comment-29963364-20180204090049

Imagine you have two different types of gas (one is low-quality, and the other is high-quality). You have one galon of each type. You use the low-quality gas to fuel a vehicle, and it drives for 10 miles before it runs out. You then use the high-quality gas, and the vehicle drives for 100 miles before it runs out.

Why is this? You used the same amount of each gas, so why does one work better? It's because the high-quality gas is "more powerful" than the low-quality one. "Power" is a matter of "effectiveness" rather than "amount." Now let's talk about Issei and his [Boosted Gear]. Issei has very little Demonic Power (a bit more than the average Devil child), yet he's recently been defeating opponents who are Satan-Class to God-Class and above. Let's assign imaginary numerical units to Issei's power, and that of an average High-Class Devil. Issei Average High-Class Devil (AHCD) With Issei's power, he could destroy a large boulder, while the AHCD could destroy a small mountain. by this logic, the AHCD is "more powerful" than Issei. But, if Issei used "boost" 4 times, he would still have only 75 units, but the "power" of those 75 units would be equal to 1,200 units, and he could destroy a small mountain as well. The [Boosted Gear] doesn't increase Issei's "power supply", just his power's "effectiveness." So even though Issei still only has Low/Mid-Class Devil power, his [Boosted Gear] enables him to fight on par with Satan/God-Class opponents.
 * Strength - 20 units
 * Speed - 15 units
 * Durability - 30 units
 * Demonic Power - 10 units
 * Total - 75 units
 * Strength - 80 units
 * Speed - 30 units
 * Durability - 60 units
 * Demonic Power - 1,000 units
 * Total - 1,170 units