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MacBook Pro 13" Retina Display, 모델 A1502의 2015년 3월 업데이트는 5세대 Intel Core i5 및 i7 프로세서를 포함하며 Force Touch 트랙 패드를 소개합니다.

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Zombified battery after some time without charge

I’ve got an original battery that was left for some time drained and as may be expected it lost in a way the ability to charge. “In a way” means that with controller bypass and my old trustful HP PSU I noticed the battery itself seemed alive and I managed to charge it until voltage got back at 12.5v in the cells and it shows it’s charged at about 50%. However, and this is the sad note, system doesn’t charge it further (although all battery data are there cycles, capacity which is very good and so on) nor gets powered by the battery.

It seems from my limited battery technology knowledge that the controller got in the red light state and holds power flow in both directions. Anybody has ever looked deeper into Apple batteries architecture and knows of a way to reset the controller, if ever possible ?

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Review this vid from Louis Rossmann What does knockoff charger do to Macbook Pro Retina? Most likely the systems charging logic was damaged at some point.

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Luckily, after years repairing logic boards daily I can tell if I have a problem on a charging circuit without watching youtube videos. As I said in the question I'd appreciate some insight on a completely different issue that pertains specifically the battery circuitry..thanks anyways.

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Did you inspect & measure the resistors? I have to order another gross of them as I've run out!

The logic within the battery does not control the charge or discharge its the logic board circuit. It only monitors the temp and cycle count.

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