mirror of
https://github.com/mbirth/wiki.git
synced 2024-11-09 13:16:45 +00:00
107 lines
3.9 KiB
Markdown
107 lines
3.9 KiB
Markdown
---
|
|
title: Apple MacBook Pro A1286 Battery Replacement
|
|
layout: default
|
|
language: en
|
|
created: 2017-05-14 16:42:29 +0200
|
|
updated: 2017-05-14 16:42:29 +0200
|
|
toc: false
|
|
tags:
|
|
- know-how
|
|
- hardware
|
|
- apple
|
|
- mac
|
|
- macbook
|
|
- battery
|
|
- replacement
|
|
- a1286
|
|
- a1321
|
|
- a1382
|
|
---
|
|
If you have a MacBook Pro A1286 (15.4", Late-2008 until Mid-2012) and want to replace the battery,
|
|
you must be aware of the specific battery in your device. In 2011, for some reason, Apple decided
|
|
to switch from the battery model A1321 (73 Wh) to model A1382 (77.5 Wh). While the form-factor
|
|
stayed the same, Apple changed the connector and pinout.
|
|
|
|
|
|
|
|
In the above picture, the A1321's connector is the top one with the A1382's at the bottom. Notice
|
|
the small "+" and "-" marks on the plugs which indicate the changed polarity.
|
|
|
|
If you search for the model numbers and the word "battery", you'll soon end up on
|
|
[this page](https://www.ifixit.com/Answers/View/74372/Switch+battery+connector+on+the+battery+itself+%28A1321%29)
|
|
or probably [this one](https://www.ghostlyhaks.com/forum/macbook/715-fun-facts-for-non-efi-related-apple-repairs).
|
|
|
|
As you can read there, the pinout of one battery is:
|
|
|
|
[+12] [+12] [+12] [SCL] [DET] [SDA] [GND] [GND] [GND]
|
|
|
|
while the other one is:
|
|
|
|
[GND] [GND] [GND] [SCL] [DET] [SDA] [+12] [+12] [+12]
|
|
|
|
(`SCL` = SMBUS_SMC_BSA_SCL, `DET` = SYS_DETECT_L, `SDA` = SMBUS_SMC_BSA_SDA)
|
|
|
|
Here is a photo of both batteries where I've marked the `+12V` lines (left: A1382, right: A1321):
|
|
|
|
|
|
|
|
If you are comfortable with using a soldering iron and doing some delicate soldering, you can
|
|
"easily" (sort of) swap the connectors and the `12V` and `GND` wires. The 3 wires for the `12V`
|
|
supply and the 3 `GND` wires are shorted, so they're not going to different cells and it's not
|
|
important whether you swap 1-2-3 with 7-8-9 or 9-8-7 or 7-9-8 or 8-7-9 or … (and vice versa).
|
|
|
|
**I DON'T TAKE ANY RESPONSIBILITY FOR WHAT YOU'RE DOING TO YOUR HARDWARE. Just because it worked out
|
|
fine for me, doesn't mean it will work for you.**
|
|
|
|
<p><div class="notewarning" markdown="1">
|
|
When working with Li-Ion or Li-Polymer batteries, it's really important to **never** short the
|
|
battery terminals ("+"/`12V` and "-"/`GND`) and to not physically damage the battery packs.
|
|
Otherwise, the battery could get very hot and even explode, releasing dangerous gases in the
|
|
process.
|
|
([More info.](https://electronics.stackexchange.com/questions/176527/hazards-of-puncturing-lithium-ion-batteries))
|
|
</div></p>
|
|
|
|
<p><div class="noteimportant" markdown="1">
|
|
Please take extra care to connect the 3 middle wires in the exact same order as they were in the
|
|
other connector. They are for the identifier chip and if you mix them up, the MacBook won't
|
|
recognise the battery.
|
|
|
|
**ALSO DOUBLE- AND TRIPLE-CHECK EVERYTHING! TAKE YOUR TIME!** (The whole process took me almost 2
|
|
hours.)
|
|
</div></p>
|
|
|
|
Once you're done, it might look like this:
|
|
|
|
|
|
|
|
Time to plug it into the MBP. Watch out for funny smells, smoke or the battery heating up. But if
|
|
everything went fine, you should be able to turn on your MBP just fine.
|
|
|
|
Once it finished booting up, head into the system information and check the battery info. For me,
|
|
it looked like this:
|
|
|
|
|
|
|
|
**SUCCESS!**
|
|
|
|
|
|
Bonus Picture
|
|
=============
|
|
|
|
This is the controller PCB of the old A1321 battery:
|
|
|
|
|
|
|
|
The three Microcontrollers (`U`-label, all on the left hand side) on there:
|
|
|
|
* `U200`: TI *bq20Z45* Charging Controller
|
|
* `U301`: CJG W --- TI *bq29410DCT* Secondary Over-Voltage Protection
|
|
* `U302`: CBZ --- TI *TMP102* Low-Power Digital Temperature Sensor with SMBus
|
|
|
|
|
|
*[MBP]: MacBook Pro
|
|
*[PCB]: Printed Circuit Board
|
|
*[SCL]: Signal Clock
|
|
*[SDA]: Signal Data
|
|
*[TI]: Texas Instruments
|