The infantry used by the Trade Federation had several major shortcomings that were carefully revisited by the battle droids' designers. From that research came the super battle droid, a bulkier, stronger, and more advanced version of the standard mechanical soldier.
The super battle droid requires no overriding command signal to operate, and thus has a limited degree of independence. Delicate components that were clearly visible in the standard battle droid design are now protected by a hardened armored body-case. Mounted on its right manipulator is a double-laser cannon built into the droid's design. Heavy weapons units carry an integrated rocket launcher rather than the cannon.
Super battle droids, like their inferior predecessors, have very rudimentary programming and are poor at formulating attack plans. They are, however, fearless and tireless, and will run at full speed into combat, their cannons extended, firing until they have reduced their targets to smoldering ruins.