[Q] Checking wakelocks without root

I've been having some massive battery issues the past week, with a full charge going dead after only 8 or so hours of medium to low usage. I thought it was maybe the battery, so I bought a new one, but it's still doing it. GSAM shows "Android System" taking up the most battery by far (close to 28%), but I have no idea how to narrow that down to specifics. And after I updated the last OTA, I lost root, so Wakelock Detector isn't working anymore. What's the best way to figure out what's causing this? It's super annoying. :(

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