A defensive drone upgrade that can be used to negate incoming damage.
Warning: The Shield Upgrade must be manually activated! (command: shield)
By default the Shield Upgrade has a maximum of 500 hitpoints and does not replenish.
The Shield Upgrade can be modified at the cost of 5 scrap in order to allow it to recharge automatically whilst within a mission. This decreases its charges (hitpoints) to a maximum of 100 however.
It can also be modified to allow it to move through rooms which are irradiated.