When your iPhone’s battery level dips below 20%, a persistent pop-up alert appears front and center on your display to let you know. Most people cringe at these kinds of notifications because they get in the way of everything, but a free jailbreak tweak called LowBatteryBanner by iOS developer SparkDev can help.
As you might have inferred from the name already, LowBatteryBanner replaces the standard low battery level pop-up alert with something we can all appreciate: a banner notification.