On Snap Map, the battery symbol next to a friend’s name indicates the status of their device’s battery. Specifically, it shows how much battery life they have left. A full battery symbol means they have a lot of battery remaining, while a low battery symbol indicates that their device is running low on power. This feature can help you understand whether your friend might be available for a conversation or might be less responsive if their battery is running low. It’s a way for users to gauge the availability and potential responsiveness of their friends based on their device’s battery status.