So about 2 months ago I installed CM 11 on my Droid 4 and it was my first time doing a custom ROM on an android device. I was extremely satisfied with the results of this as it improved my phone to a well optimized 4.4.2 and making my phone significantly faster compared to stock.
However, for the past 2-3 weeks my phone has become a completely broken mess. For starters the phone gave me strange battery statistics. When turned off and plugged in, the phone would read as 100%, but when I booted in CM 11 the battery would be at 60% and would every so often the phone would jump from 60% to about 15% in literally seconds. The phone shuts down during usage constantly, usually when the battery reads at <60%. Before it does so "Android System" would open up on the screen and immediately close then the phone will read "Shutting down..." sometimes doing so immediately after the boot screen. This became very infuriating so I loaded up stock to see if the same problem occurs. Sure enough, it did. However, before shutting down, the phone would keep going into cooldown mode multiple times. Sometimes it would cool down for only a few seconds, sometimes it would be in cooldown mode for up to 2-3 mins. With that information could someone please tell me what I can do? Do I need a new battery or a new ROM? or do I need a new phone all together? Thanks in advance.