Abstract: Batching messages such as notifications intended for a user to preserve battery life on a computing device associated with the user. A server such as a proxy server receives the messages from one or more service providers. The proxy server maintains a state of the user. If the state indicates that the user is idle, the messages are stored at the proxy server unless the messages correspond to activating messages. The activating messages are sent to the user upon receipt. The stored messages are sent when the state changes to an active state or when a defined duration of time elapses. In some embodiments, the messages are presence notifications in an instant messaging session on a mobile computing device. By reducing the frequency of sent notifications, the battery life of the mobile computing device is preserved.