These droids were critical in helping the Trade Federation with their subjugation of the planet Naboo. Though expensive to produce, they were some of the most powerful and fear-instilling weapons the Federation had. Their true advantage is in their rate of fire, with each round resulting in an incredible amount of fire dispensed at its opponents. ...

The R2-Delta upgrade was a joint effort between Industrial Automaton and the New Republic's naval engineers to modernize the software on the old, but reliable, R2 unit. E-Wing pilots had long enjoyed the custom design of an R7 unit, which made hyperspace calculations and other droid-operated systems that much more efficient. Once the XJ model X-Wing went into production, engineers began designing a software and hardware upgrade for existing R2 units which would provide the same starfighter-droid compatibility as the E-Wing/R7 unit design. ...

After their failings at the Battle of Naboo became readily apparent, the older models of centrally-controlled battle droids quickly went out of production. Despite huge financial losses, Baktoid Combat Automata simply remodeled their battle droids, and used their existing manufacturing facilities to begin producing their new, improved E-5 model. ...

The Phase III Darktrooper is not truly a droid like the first two types. It is actually a powered suit of armor which can be used as one would any other powersuit, albeit one with a much more powerful arsenal. ...

The Dark Trooper Type II was a strong improvement over the Type 1 when it came to sheer combat skill. Though slightly slower than its predecessor, it still manages to boast an impressive amount of firepower while maintaining its maneuverability. ...

The Dark Trooper Phase I is little more than an automated killing machine. It is a droid specially designed to be the most lethal killing machine the Empire ever produced, and its skeletal appearance is frightening to all who oppose it. ...

These special model Incinerator Battle Droids are specially designed for debris-clearing purposes, however it is clearly seen how they can be used for more sinister purposes. They bear twin flame emitters which blaze with intense heat that is capable of breaking down most debris, and also clear-burning natural environments like forest or grass. ...