Explore techniques for building battery-efficient Android apps in this 46-minute conference talk from Big Android BBQ 2015. Delve into the workings of cellular networks and their impact on app development. Learn to avoid common pitfalls when accessing networks, and master strategies like pre-fetching, batching, and content segmentation. Discover socket management and persistent connection techniques through code-heavy examples. Gain insights on periodic traffic, multiple connections, cache expiration, and connection management. Examine advanced techniques including transaction types, Job Scheduler, Sync Adapters, and GCM Network Manager. Understand when to prefetch data, optimize background updates, and test for battery efficiency using tools like the application resource optimizer.