Hybrid systems combine electrostatic and faradaic energy storage. Therefore, faster charging than a battery is possible. 

Hybrid capacitor systems easily surpass the power density of batteries and have significantly higher energy density than double-layer capacitors.

Due to the faradaic energy storage component, hybrid capacitors have a limited and narrow operating voltage range, similar to batteries. While this voltage stability is beneficial in many applications, capacitor voltage and current have to be carefully managed in order to maintain optimum performance over a long operational life.