Central Power Battery (Earth-6531)

The Central Power Battery, also known as the Great Power Battery, is the main reservoir of energy of Oa and the Green Lantern Power Batteries, created by the Guardians of the Universe following their discovery of the Emotional Electromagnetic Spectrum.

In the past, the Guardians trapped the fear being Parallax within the Battery, hoping to end his era of fear, but inside the energy of Willpower, it corrupted the Yellow Impurity.

History
The energy of the Emotional Electromagnetic Spectrum was discovered by the Oans once they arrived on Oa after a pilgrimage from their original world. Using their powerful psionic abilities, they were able to create the Central Power Battery, which was able to contain the Green Willpower.

With this energy, they were able to forge the Power Rings and the Power Batteries to recharge these rings, becoming one of the most powerful weapons in the galaxy. The Central Power Battery would also serve as a recharge station for the entirety of Oa to survive.

After Hal Jordan arrived on Oa, he was greeted by Tomar-Re, who gave him a tour through the planet, and the couple passed through the Battery.

The Central Power Battery came under attack of the Manhunters in 2013 following a surprise attack of the machine race. Fortunately, Hal Jordan and Thaal Sinestro were able to save it, alongside the lives of other Green Lantern trainees.

Capabilities
The immense energy from the Central Power Battery, filled with Willpower, is what powers and fuels the energy used by every Green Lantern in the universe], as well as powering the planet of Oa itself.