The phrase "maximum power" refers to the highest level of energy or strength that something or someone can achieve. It means reaching the limit of what is possible in terms of output or performance. Full definition
Once that mark has been surpassed, the spell will gradually grow more powerful until it reaches it's maximum power of 310 ~ 330. (dragon-quest.org)
Maintaining the correct ignition timing throughout all operating conditions is essential to producing maximum power, using fuel efficiently and minimizing emissions. (hondanews.com)
Smaller steps between the gears also help the engine maintain the optimal speed for maximum power at almost all speeds, especially when exiting a corner on a track. (greencarcongress.com)