- "The goal of our Sheikah research lab is simply, really. We aim to destroy the Calamity that has endured across time...to rid Hyrule of its dark influence... and above all...to rescue Princess Zelda, who is now a prisoner of the Calamity. We have worked ourselves to the bone conducting our research. For a time, I feared I'd pass before we could prevail. HOWEVER! You, Link, managed to awaken before this old sack of flesh gave out. That means... THE TIME IS NOW! Hm, yes yes! You! Now is the time to join forces with us Sheikah, yes? We must destroy the Calamity!"
- — Robbie
Akkala Ancient Tech Lab is a location in The Legend of Zelda: Breath of the Wild. It is Sheikah technology research lab created by Robbie after the destruction of the Royal Ancient Tech Lab during the Great Calamity where he continued his research into ancient technology.
Robbie built his lab in the old lighthouse located in Akkala during the Age of Burning Fields some point after escorting Purah to Fort Hateno as Impa, Purah, and Robbie had decided to split up to ensure at least one of them would survive to help Link. While on his way to Akkala, Robbie was attacked by Guardians but he defeated them easily thanks to his knowledge of their weaknesses gained from years of researching them.
Due to the number of broken Guardians within the region which was the sight of an epic battle between the Guardians and surviving Hyrulean Soldiers and Knights that had retreated from Hyrule Castle to Akkala Citadel following the Great Calamity, Robbie was able to find plenty of materials to continue his research into developing ancient weaponry and Armor that he hoped would aid Link in combating the Guardians and Ganon's forces once he awoke. Like the Hateno Ancient Tech Lab Robbie powered his lab using the blue flame to power his furnace and melt ancient materials into ancient soldier gear. He also remodeled his Guidance Stone to create a machine he dubbed Cherry after his first love. He eventually developed the idea to modify Cherry further so she could speak to ease his loneliness, but the task proved too complex forcing him to put his desire to remodel her on hold. When Robbie was around 90 years old, a young female Sheikah named Jerrin, a student of Dr. Purah's who Impa had sent to aid Robbie in his research. She quickly proved herself to be a capable assistant, even managing to complete Robbie's plans to remodel Cherry. Robbie was so taken by her that he eventually married her. However, their marriage was not without trouble, as Jerrin quickly become jealous of the remodeled Cherry and uneasy with its interactions with Robbie who came to rely on Cherry's assistance more and more. Robbie realized the effect this was having on Jerrin so he remodeled the Cherry to speak in a more robotic fashion and began referring to it only as "Ancient Oven" to avoid angering his wife. Eventually Jerrin gave birth to a baby boy she and Robbie named Granté. For a time the three of them lived happily as a family. Unfortunately it was only a temporary peace as Princess Zelda continued to struggle to contain Calamity Ganon under seal within Hyrule Castle. Robbie and Jerrin continued their research and Grante eventually grew into a young man. Grante decided to leave the lab that has been his home to explore the world, with the blessing of his mother and father.
Link first visits the lab as part of Robbie's Research Side Quest, which Link receives from Purah after completing the Locked Mementos Quest during the main story. If Link visits the lab before the quest he will find no sign of Robbie or Jerrin and the Ancient Oven Cherry will barely have enough power to even speak.
During the quest itself, Link encounters the Cherry who can barely speak, before Robbie and Jerrin show up and demand to know who he is and what he is doing there. Robbie however vaguely recognizes Link. Jerrin however finds Link suspicious and refuses to talk to him until he has proven himself to be an acquaintance of Robbie's. After Link proves his identity to Robbie by showing him his battle scars left behind by the injuries Link sustained during the Great Calamity that lead him to be placed in the Slumber of Restoration to heal. Robbie is happy that he lived long enough to aid Link in combating Ganon and wants to create some ancient soldier gear for him, but reveals that Cherry has lost power due to his furnace's blue flame going out and asks Link to go to the Ancient Furnace in Deep Akkala to restore power to Cherry. After relighting the lab's furnace, the Akkala Ancient Tech Lab's Travel Gate activates allowing Link to use it as a fast travel point.
After restoring power to Cherry, Robbie allows Link to use her to forge ancient soldier gear in exchange for Rupees and guardian parts. The equipment obtained here is effective for combating Guardians.