One of the most important technologies recovered from sylph expeditions to Llyri’s outer reaches is the battery, a device which stores an electrical current for later use. Though the sylph do not have the means to replicate the technology—certainly not to the same effectiveness as those discovered—hundreds have been found in the wreckage strewn throughout the Landing Vale, and they are instrumental in powering some of the very equipment that allows the sylph in Llyri to survive ash-free.