Any good LG G3 Replacement Batterys?

[AsilentG]

So I recently got an LG g3 its great but the battery drains kinda fast, I barely make it through school,Ive already tried factory resting but it didn't fix it.So I was wondering if there is any good battery brand to replace my stock battery.I've been looking at the Hyperion battery that holds 6000mah and comes with a case to hold the battery and it kinda thicks the phone, and then I saw the Zero lemon battery which has 9000mah but adds more bulk but its also a protected case for the phone.

So my question is,Should I get one,and are they any good?

If you could help me,I really appreciate it. Thx