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A1708 / EMC 2978 — Released October 2016, this entry-level MacBook Pro retains its traditional function keys (as opposed to the OLED Touch Bar). The function key version packs an Intel Core i5 and two Thunderbolt 3 ports.

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A1708 battery control board cable damage?

I was installing a replacement battery in my Apple MacBook Pro Retina 2016 with function keys, and after the install I noticed the tiny cable on the battery from the battery control board to the top of the battery has ripped.

I’ve circled the cable in the image below.

Does anyone know what the purpose of this cable is? Is it dangerous to keep using the device with this ribbon ripped?

The device appears to be working fine, turns on when using battery, appears to charge fine, however I’m concerned this cable has been torn off.

Any help would be greatly appreciated.

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Thats the battery sensor cable, your battery has a bunch of sensors to monitor temp and voltage inputing into the micro controller on the main board of the battery to control the charging and this information is also forwarded to SMC logic inside your systems logic board.

Sadly its time for a new battery if the wires are damaged within it.

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Thanks for your reply, this is a new battery so was hoping I didn’t have to replace it again. It seems to be working fine at the moment. Not sure if this would impact things like coconut battery, which seems to be reporting temps and voltages correctly.

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If its the new one did you damage it or was it damages when you got it? If it was bad from the start I would get a replacement.

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Unfortunately I did not pay attention to whether it was broken prior to installation... I've been running the MacBook for several days and all seems to be fine. I'm just concerned if this is like to cause any issues in the future?

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@xmarksthespot - Sorry I can't answer that. I would need to see it in person and do some tests to make sure the lines are not damaged and I would likely apply additional support so it wouldn't get worse. Remember the battery expands and contracts in size so this cable will get stressed!

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