Picked up new battery after 1st night drain pretty quick

[Aesthete18]

Got a new battery recently and first day was perfect, took 24 hours before needing to charge but after that it's about 10 - 12 hours even with minimal use. How do I check what's draining my battery? I got the wakelock detector but i don't think it's showing anything useful. Most I see is Line has 300+ alarm but all my Line notifications are off so there's no other way to rectify that. Any ideas?

 

[jasonandrews25788]

are you sure it's an original battery?

 

[Aesthete18]

are you sure it's an original battery?

I don't think it is. I got it online but it had good review, it's a replacement battery it seems not sure what that means. I have a 3 month warranty but I just wanted to make sure it's not my phone first. Anything I can do?