It annoys me when I see 5.1 megawatts quoted as the phaser power of the Enterprise-D
The phase cannons of the NX-01 were quoted as 500 gigajoules and as soon as they were bought online, they were overloaded by ten times so at least 5000 gigajoules/5 terajoules. For something outputting 5.1 megawatts to produce even 500 gigajoules, it would take over a day and the NX-01 was not charging every blast for a week
A standard Federation phaser rifle was put at 1.05 megawatts in TNG itself (The Mind's Eye), in DS9 a Cardassian phaser rifle was put at 4.7 megajoules, in Enterprise again phase pistols are put at up to 10 megajoules.
The graphics of the Wounded show the Cardassian ship outputting 700 megawatts and at that point the Cardassian ships were still getting clearly outmatched by federation ships
