VoltVault is an application that helps users track battery replacements for various devices such as vintage remotes, smoke alarms, and household gadgets. Users can create a battery card for each device, where they can enter details such as the type of battery used and the date of replacement. The app predicts future battery replacement windows based on the history of each device. Users can view a tidy history of past battery swaps for each device. The app allows for easy organization of devices, enabling users to quickly find the information they need. Notifications may be set for upcoming replacement dates. The interface is designed to be user-friendly, allowing for simple navigation between different device batteries. Users can edit or delete battery cards as needed.