I have both the Apollo Lite and the newer Apollo X25.
Been using Apollo Lite since it came out and manage to optimise it to 1.5 days of battery life with both networks always on + 4G & Calls, moderate app usage + music listening.
I then replicated all settings on Apollo (including Permissions - many apps are restricted in the background) + apps. Comparing the two, the Apollo x25 is visibly draining faster than Lite.
I even tried switching the Apollo X25 on Airplane mode and in this case it gets close to Lite's power consumption (Lite having BT, WiFi and 4G always on...) and at the end of the day it's still the Apollo X25 with less battery left.
I believe this is software-related, I must mention that both my devices are up-to-date with the latest OTA updates.