Telegram’s Power Saving Mode is designed to “extend battery life and improve performance on older devices.” The mode works by disabling several in-app effects that consume more power than usual. For instance, the autoplay videos/GIFs feature plays and loops the content in chat. Even when users aren’t watching the clip or the GIF, autoplay makes them run on a loop, drawing more battery. Hence, the app disables the feature and others like sticker/GIF animation, interface effects, and preload media in its Power Saving Mode. In other words, it is Telegram’s counterpart of the regular battery-saving mode on Android and iOS phones.
Here’s How You Can Enable Telegram’s Power Saving Mode