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Hey guys, so i got a battery from iFixit and soon after i replaced it i began to get random shutdowns, the mac was running incredibly slow. I noticed when it started to get really sluggish if i press the button for the battery indicator (the one on the side) it showed like there is no battery (no lights lit green) Had to reset the SMC in order for it to work properly again. So i did an SMC & PRAM Reset, tried to charge it to 100% and drain it until 0% a few times but to no avail. So i messaged them and they sent me another one (the one i got might be defective) The second one gets here, i replace it and it got even worse, way worse… every 10-20 min. i get shutdowns. So luckily i kept my original battery which is at 1300 cycles and swapped it just to make sure my mac runs fine with it. Three days have passed since and i have no issues. Im running Mojave (last update) A Data SSD + WD Black 16GB Ram 1333MHz (2 diff sticks)
Lets get a bit more info on the battery and the charging logic. Install this gem of an app CoconutBattery take a snapshot of main window with the MagSafe plugged in and a second one with it disconnected. Post both here for us to see Adding images to an existing question I would also recommend you review this Apple T/N to make sure the MagSafe adapter is the correct one as well as the cable & connections are good Apple Portables: Troubleshooting MagSafe adapters.
I also have a 15" 2012 Mbp shutting down randomly, and which shows one error in ASD SE150 test, pertaining to the ATV table test for the battery, “programmed charge table not in use”. This Mbp shuts down randomly every now and then, without giving any error report or kernel panic notification. I know that a funky battery can render havoc, so I now will run it with another battery, which passes the ATV charge table test. This appears to be common issue with aftermarket batteries.
