Sadly you have a twofer! You clearly need a new battery which is the easiest to fix [product|IF123-054-5] and the guide [guide|45137]. But your logic board is also damaged! The charging logic was damaged by a knockoff charger which is why the charger is not charging the battery at all (zero watts). That will need someone with deeper skills to fix and you still need to replace the charger with a REAL Apple unit: [https://www.apple.com/shop/product/MD592LL/A/apple-45w-magsafe-2-power-adapter-for-macbook-air?|Apple 45W MagSafe 2 Power Adapter for MacBook Air]
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Sadly you have a twofer! You clearly need a new battery which is the easiest to fix [product|IF123-054-5] and the guide [guide|45137].
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But! your logic board is also damaged! The charging logic was damaged by a knockoff charger which is why the charger is not charging the battery at all (zero watts). That will need someone with deeper skills to fix and you still need to replace the charger with a REAL Apple unit: [https://www.apple.com/shop/product/MD592LL/A/apple-45w-magsafe-2-power-adapter-for-macbook-air?|Apple 45W MagSafe 2 Power Adapter for MacBook Air]
● [https://lifehacker.com/dont-replace-your-macbook-charger-with-a-cheap-knockoff-1825605569|Don't Replace Your MacBook Charger With a Cheap Knockoff]
● [https://beetstech.com/blog/oem-magsafe-chargers-vs-counterfeits-teardown-for-truth|OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth]
● [http://www.righto.com/2016/09/why-you-shouldnt-use-cheap-macbook.html|Lacking safety features, cheap MacBook chargers create big sparks]
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● [https://www.youtube.com/watch?v=DrxAuhrrLU4|FAKE Magsafe MacBook Chargers on eBay - Watch before buying a Mac Charger]
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● [https://www.youtube.com/watch?v=DrxAuhrrLU4|FAKE MagSafe MacBook Chargers on eBay - Watch before buying a Mac Charger]
Sadly you have a twofer! You clearly need a new battery which is the easiest to fix [product|IF123-054-5] and the guide [guide|45137]. But your logic board is also damaged! The charging logic was damaged by a knockoff charger which is why the charger is not charging the battery at all (zero watts). That will need someone with deeper skills to fix and you still need to replace the charger with a REAL Apple unit: [https://www.apple.com/shop/product/MD592LL/A/apple-45w-magsafe-2-power-adapter-for-macbook-air?|Apple 45W MagSafe 2 Power Adapter for MacBook Air]
● [https://lifehacker.com/dont-replace-your-macbook-charger-with-a-cheap-knockoff-1825605569|Don't Replace Your MacBook Charger With a Cheap Knockoff]
● [https://beetstech.com/blog/oem-magsafe-chargers-vs-counterfeits-teardown-for-truth|OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth]
● [http://www.righto.com/2016/09/why-you-shouldnt-use-cheap-macbook.html|Lacking safety features, cheap MacBook chargers create big sparks]
● [https://www.youtube.com/watch?v=DrxAuhrrLU4|FAKE Magsafe MacBook Chargers on eBay - Watch before buying a Mac Charger]