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Sometimes runs for hours on AC power, sometimes can’t get through ram check chime before rebooting. Eventually OS reported “battery poor, replace now” even though it reports over 7200 mah charge. At start of issue testing, I’m almost certain battery health was good since it was the first thing I checked. Additionally the battery indicator LEDs were 5 for 5. Now blink all 5 (assume this is error, and not discharged battery indicator). Disconnected battery and attempted to run off AC. I have done this successfully before when testing trackpad alignment issue when the original battery was swelling a couple of years ago. (Now on 2nd NuTech battery which is now just over 1 year old.) will not run off AC power alone. Based on premature failures of 2(?) Nutech batteries and current symptoms, I suspect the DC in power module to be failing. Is this diagnosis correct? What are the symptoms of a failing DC in power module besides the obvious no charge/power indicator from the adapter associated with total failure? Charge indicator is green with or without battery installed. When this issue began yesterday morning, I was getting a charging (amber) indicator when appropriate. Is there a better diagnosis I’m missing? Is there anything besides the logic board, DC in power module, and battery in the equation? I have tested with 3 different 85W power adapters but honestly do not suspect they are the issue. One other really odd anomaly while testing the first day— just once the laptop screen shut off and would not turn back on. Initially I thought it was another complete instaneous shutdown, but in a darkened room I noticed keyboard backlight on. I was able to ping, attempt ssh (had disabled remote login somehow), and SMB to laptop for an hour before rebooting which fixed screen issue but immediately completely shutdown again after reboot and login. I even tested a clean 10.13 system recovery installation on second drive in early testing, but symptons persist with slightly longer up interval— likely due to less activity loading login items since my favorite helper apps are not setup on this installation. Any help would be greatly appreciated. Thanks
Sorry no, your battery is gone! The blinking battery checker LEDs is telling you you’ve hit the cycle limit of the battery About the battery indicator lights on MacBook (13-inch, Aluminum, Late 2008) and MacBook Pro (Late 2008 and later) & Determine battery cycle count for Mac notebooks Time for a new battery
