The Caretakers

The AI built by the Gagarag race designed to treat them.
The Caretakers, despite being entirely mechanical and sapient, are not counted as Sentient Robots because the Hyperion Federation did not construct them. The Caretakeres are a humanoid robot that gave themselves the ability to self replicate. They have a strong capacitor for a battery and can recharge in mere moments. There is also a backup capacitor in case the primary runs out of power. The backup one is purely to find an energy source. If a caretaker runs out of capacitor power, it might cause its death. Charging ports are located all over the KC territory. Maintenance on robots is carried out automatically in various repair stations. It can also be performed by other Caretakers, should the need arise.