Power pack

Power packs are an optional upgrade for Zone trooper and Zone raider. It increases the durability of their powered armour, and includes sophisticated medical systems that allow them to recover from most injuries.

Behind the scenes
In configuration files and Kane's Wrath patch notes, they are referred to as autoinjectors, indicating they are actually integrated into the wearer's body.

Changelog

 * Kane's Wrath patch 1.02: cost/research time reduced to $1000/30 sec