[quote=@Sep]
<Snipped quote by ZAVAZggg>

The show also has some of them destroyed. Though the reason why is never properly explained. Though like the show we can assume that drones are single use. Once they've been fired, they can't be reactivated even if they do survive as their power source runs out (See Atlantis S01E01). 
[/quote]

Ah, okay.