You didn't say what your battery drain is like. How much screen time do you get? If it's in the 3 to 4 hour range, that's about all most phones get (excluding a few with giant batteries). If you're getting much less than that, then you've got an issue going on, likely caused by a specific app.
Yes, please search this forum- there are tons of battery threads (like there are for EVERY phone model) with tons of good suggestions. There is nothing inherently bad or wrong with the N5 battery.