Ummm, I know you're going off the movies only, which its true you don't see Han calling for clips. But in the books and lore, their are things called "powerpacks" and the DL-44 blaster does have a "low-charge" alarm which sends a mild tingle through the palm of the user. (That's something I remember from the Han Solo Trilogy)
Anyways, if you look on wookiepedia you can see some evidence of the need to "reload"
"The Power 5 was slightly less powerful than the DL-44, and consequently smaller, firing more bolts per power cell."
http://starwars.wikia.com/wiki/Power_5_ … ter_pistol
Now, as far as I can tell, in First Strike you've got one powerpack and thats it.
Which is totally fine. But I just wanted to clarify that the star wars blasters DO in fact reload. Don't bash battlefront too hard for that. They did get it right there.