You can send background push notifications which are delivered when the phone is ready for them. They don't deliver when the phone is low battery or in low battery mode. It's specifically made to reduce battery consumption.

Higher priority push notifications require a user visible UI element and ca be delivered regardless of certain low power situations.

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wrs 5 days ago | parent | next [-]

It sounds like this only helps power consumption after you've already run low on power. Seems like processing frequent notifications would accelerate your progress toward that low power state.

	▲	kccqzy 4 days ago \| parent [-]
		Yeah but many people turn on Low Power Mode manually every time they unplug or via automation at a high threshold.

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refulgentis 5 days ago | parent | prev [-]

> Higher priority push notifications require a user visible UI element

The QR code for a pass sure sounds like a priority user visible UI element.

	▲	jon-wood 4 days ago \| parent [-]
		Only if it’s visible, from the sound of it these are background notifications so that the QR code can be ready if you open the pass.