> Replicating FCM's functionality inside apps leads to a significant increase in battery drain. Are there any tests that can be referenced on this subject? I'

> Replicating FCM's functionality inside apps leads to a significant increase in battery drain. Are there any tests that can be referenced on this subject? I've heard a completely different story from people that run Conversations (XMPP client) without FCM. They claim the battery drain is minimal. (it may depend on the messanger usage)