This article is a stub. You can help Dr. Brain Omnipedia Wiki by expanding it. The Hint Watch Battery is an inventory item in The Island of Dr. Brain. The are used in the hint watch. Retrieved from "https://drbrain.fandom.com/wiki/Hint_Watch_Battery?oldid=3954" Categories: Article stubs Inventory (DB2) Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.