Atari shows you how to replace a Nexus 5 battery. The technique is simple and can be applied to any phone from a Moto X to an iPhone 6!
How To Repair The Nexus 5 Speaker and Microphone
Apparently I goofed when I repaired my Nexus 5 battery, causing the microphone and speaker to stop functioning. After a little trial-and-error, I’ve determined an easy solution to repair the Nexus 5 speaker and microphone.