Let’s do an SMC reset [https://support.apple.com/en-us/HT201295|How to reset the System Management Controller (SMC) on your Mac] to make sure you don’t have a problem with it. Do a second CoconutBattery snapshot in four hours after the reset.
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=== Update (08/29/2019) ===
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Lets check your MagSafe to make sure its the correct one and is in good shape. review this Apple T/N [https://support.apple.com/en-us/HT203207|Apple Portables: Troubleshooting MagSafe adapters] a worn cable can short-out all inspect the systems MagSafe connector are the pins shiny and not tarnished? Is the connector clean? If not take a cotton swap with the isopropyl alcohol to clean it.
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Also make sure you have a real charger as a fake one can damage your systems voltage regulator logic [https://beetstech.com/blog/oem-magsafe-chargers-vs-counterfeits-teardown-for-truth|OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth]
Let’s do an SMC reset [https://support.apple.com/en-us/HT201295|How to reset the System Management Controller (SMC) on your Mac] to make sure you don’t have a problem with it. Do a second CoconutBattery snapshot in four hours after the reset.