[Nexus 6 Android Development] Axel85:
Hi I m here to report my battery replacement experienceafter a week (sorry for my bad english):

Short version: replace battery ,Nexus 6 is very sensitive and even a battery that feels good can give you many strange problems that you belive comes from rom

Long version: I had 3 nexus 6 all replaced by google in warranty with refurbished devices and all sharing strange problems with battery. The most common was shutting down completly before 1%; . With the last one I have now also had some crashes hard reboot , reboots after calls, and hard shoutdowns without the turning off screen ( two times those shoutdowns corrupted the rom and forced me to clean flash) . I tried everything , overvolt , downclock , clean flash with no apps , kernels acc... but never got any good results . Searching on internet and looking around with my direct experience with 3 devices I thought that there was nothing I could do because the phone was badly engineered . I always charged them all with a good quality charger and a perfect condition cable in slow charging mode , or even tried to use the fast original one sometimes , but sadly without improvements . The worst thing for me was having a great stereo smartphone without the possibility to use itat full power with battery under 50% . Nexus 6 is my daily driver for life and for work ,I have 120 apps on it ,3000 contacts and 5 accounts ,I use it to work and aside from those problems I really love it . For me there s no phone with the same specs , everyone is missing something . One month ago I started to think about a new smartphone , xiaomi a2 was the only one eligible between the bunch of garbage devices manufacturers build those days ... I m a technician and I want reparability good build quality and engineered solutions made to make the phone a long lasting one + stock android that for me is a buy or not buy thing. Brands like samsung , apple and huawei could should in hell for me, I don t need their good looking glass and glue sandwitches , notches and no audio jack. As a last opportunity to my nexus 6 I bought a new battery , hopless since all my nexus 6 had almost the same problem . The battery arrived from Germany and... Woow all problems solved . A week without any reboot , any shoutdown , any app crash ,any camera crash . Phone goes down till 1% and turns off correctly , volume throttle only at lower than 5% ( this is also thanks to popcorn kernel s solutions to prevent them) .I could even raise up cpu frequency to stock and undervolt the cpu to stock and phone is buttery smooth like no one of the 3 nexus 6 ever been . Nothing else changed at software level , so the battery made the miracle , and now I also know that I never had a nexus 6 with a good battery .

The first thing I noticed is that the new battery reach 1% charge at voltage over 3 , instead of 2.8 if I rember correctly of the old dpleted one , so also a good looking and correctly degraded battery is not enought for our Shamu

So finally I can tell yo REPLACE YOUR BATTERY AND LOVE YOUR SHAMU this still is a great smartphone today and pie push it to the limit... ( Nitrogen os is a complete love from day one)

ps: I can get 4.5h of screen instead of 2.5 / 3 at best with intensive working use ( inbox calls youtube chrome)