In "The Galileo Seven" (SPOILERS), Scotty reports that "one of the lines gave" and therefore "we have no fuel." Then he drains the hand phasers to fuel the shuttlecraft. Later, Spock "jettisoned the fuel and ignited it."
It all adds up to one thing: the phasers are powered by compressed gas, like a butane lighter.
Note that this does not contradict references to phasers being charged, as in "The Cage" ("They were fully charged when we left") and "Whom Gods Destroy" ("You don't think I'd be fool enough to give you a charged phaser"). The verb Charge at dictionary.com has definition 10 as well as 11:
10. to fill or furnish (a thing) with the quantity, as of powder or fuel, that it is fitted to receive:
to charge a musket.
11. to supply with a quantity of electrical charge or electrical energy:
to charge a storage battery.
Under definition 10, you can charge or recharge a crossbow, a catapult, a slingshot, a fountain pen, or a cigarette lighter. So the dialogue fits just fine with compressed gas in the phasers.
[The basic idea here was suggested privately by Metryq, but since he retired from the BBS recently I'm posting it myself.]
It all adds up to one thing: the phasers are powered by compressed gas, like a butane lighter.
Note that this does not contradict references to phasers being charged, as in "The Cage" ("They were fully charged when we left") and "Whom Gods Destroy" ("You don't think I'd be fool enough to give you a charged phaser"). The verb Charge at dictionary.com has definition 10 as well as 11:
10. to fill or furnish (a thing) with the quantity, as of powder or fuel, that it is fitted to receive:
to charge a musket.
11. to supply with a quantity of electrical charge or electrical energy:
to charge a storage battery.
Under definition 10, you can charge or recharge a crossbow, a catapult, a slingshot, a fountain pen, or a cigarette lighter. So the dialogue fits just fine with compressed gas in the phasers.
[The basic idea here was suggested privately by Metryq, but since he retired from the BBS recently I'm posting it myself.]