Starheart Lantern (Earth-2: Post-Crisis)

Green Lantern Power Battery is a lantern-like powerful energy source that recharges Power Rings.

History
At some point, Alan Scott acquired the battery and became the vigilante known as Green Lantern. Following his death in 2010, the battery was damaged and placed in the JSA Headquarters until it was taken by Courtney Whitmore ten years later.

In summer 2021, Jennie, Alan's daughter, was given the Power Ring and was attracted to the battery's location in Blue Valley. She then battled Courtney and eventually revealed her identity. Later, the new JSA discovered that Jennie has the power and energy of the battery in her body, allowing her to recharge the ring without using the battery.

Functions

 * Energy Recharge: The Green Lantern Power Ring required an extensive amount of energy to create energy constructs. In order to power it, the rings are required to recharge using the battery at least once a day.
 * Empathy: The Power Battery is connected to the emotions of its users, as shown when the battery glowed while Jennie was furious.