The Foundry

Origin
The Green Lantern Power Batteries were created by the immortal Guardians of the Universe during the time that they sought to impose order on a chaotic cosmos. Thus, they created the Power Battery which served as an energy conduit to the Green Lantern Central Power Battery on Oa. Their first servants were the Manhunters; android that used Power Batteries to charge their Energy Pistols. When the Manhunters rebelled, the Power Batteries and Energy Pistols were stripped from them and handed over to the Hallas. Eventually, that organization was also retired and the Power Battery became a common equipment amongst the Green Lantern Corps and were used to charge the Green Lantern Power Rings.

Green Lantern Corps
Power Batteries are constantly charged by the Central Power Battery to manually fuel about 7200 individual Green Lantern Rings. With few exceptions, the Power Ring was limited to a 24-hour charge and needed to be recharged at the Power Battery on a daily basis. However, that limit has been removed, meaning a Lantern is only obligated to recharge their ring when the power levels are depleted or gone. The amount of energy in a ring is measured by the ring, and relayed to the Lantern via a percentage scale of 0% - 100%.

When Abin Sur died, his Power Battery and Power Ring were passed onto the Human known as Hal Jordan. As he was growing accustomed to becoming a Green Lantern, Jordan used to store his Power Battery in a locker. During a fight against the demon Atrocitus, Green Lanterns Jordan and Sinestro had their green energy sapped by the Five Inversions Cosmic Divining Rod. In order to charge up again, Sinestro plunged his hand into the air and opened a pocket dimension where he summoned his Power Battery. Hal Jordan was surprised by this and when the Korugarian asked him if he did the same thing, Jordan replied that he kept his in a locker. An unimpressed Sinestro then told the rookiee Jordan to charge his ring so that they could fight Atrocitus once more.

The Blackest Night
John Stewart discovered a Green Lantern Power Battery on the reformed planet of Xanshi during The Blackest Night. Through his Power Ring, he discovered it belonged to the long-dead Green Lantern known as Driq who along with the native inhabitants of Xanshi, had been turned into members of the Black Lantern Corps. As the Black Lanterns attempted to swarm him, Stewart threw the Power Battery into the undead mass of people, where he fired a blast at it, explosively detonating the Power Battery. This seemingly killed the mob, only for them to rise once more because of their Black Rings.

The Brightest Day
Former Guardian of the Universe Ganthet is shown forging his own Lantern Power Battery and Power Ring within The Foundry of Oa. The process is described as arduous even for a Guardian, which goes against previous examples when a Guardian could create a permanent Power Ring on demand out of nothing. Whether or not this shows Ganthet's difficulty in switching his mindset from hope back to willpower is unknown. Furthermore, the Power Battery created lacked the round shape common in the post Green Lantern Corps design, and instead shares the simplified, squared form once seen among the Manhunters and the Halla's. Ganthet mentioned when Parallax re-infected the Green Lantern Corps that he had made his own Power Battery and Power Ring in an attempt to resist Parallax's control through the Central Power Battery. This attempt proved futile in the end.

The Alpha Lanterns
It is shown during Ganthet's experimentations on Horoq Nnot that the Alpha Lantern Battery is more rounded in shape than typical Green Lantern Corps Batteries.

Trivia

 * Coming Soon

In Other Media

 * In Green Lantern: Emerald Knights, Atrocitus manages to capture Abin Sur's Power Battery and damages it by smashing the device into the ground with such force that it begins to rupture. Abin and Sinestro comment that a ruptured Power Battery could potentially destroy a city if not a planet. This sees Abin Sur taking the damaged Power Battery into space where it explodes whilst the Ungaran was reciting the Green Lantern Oath allowing him to become empowered by its released energies.

Links

 * [//dc.wikia.com/wiki/Green_Lantern_Power_Battery http://dc.wikia.com/wiki/Green_Lantern_Power_Battery]
 * http://www.comicvine.com/power-battery/18-55747/