Friend of mine killed his MacBook with some Softdrink.

Just poured it all over his poor a1502.

He let it dry for a few days, it starts to work again.
Except the battery.

Goes on Amazon and buys a new battery.

New battery doesn't work either and so he tells me about it and I as stupid as I am couldn't resist the temptation to finally work on a MacBook like my "hero" Lois Rossmann does.

So turns out the board is good.
Cleaned it up and basically nothing happened to it.

So what's the deal with "los batlerias"?

The first got hit by liquid, the second had a broken connection to a cell.
That could have happened through my friend, installing it without testing it first, or at the seller, so it being a DOA battery.

Now away from the stupidity of my friend and the situation to the actual source for this rant.

Once something happens to a modern Managed battery, the Battery Management System (BMS) disconnects the voltage from the system and goes into an error state, staying there and not powering anything ever again.
For noobs, it's dead. Buy a new one.

But It can be reset, depending you know how to, and which passwords were set at the factory.
Yes, the common Texas instruments BQ20Zxx chips have default passwords, and apple seems to leav them at default.

The Usb to SMBus adaptors arrived a few days ago and I went to prod the BMS.

There is a very nice available for Windows called BE2works, that I used the demo of to go in and figure out stuff. The full version supports password cracking, the demo not.

After some time figuring out how Smart Battery Systems (SBS) "API" works, I got to actually enter the passwords into the battery to try get into manufacturer and full access mode.

Just to realise, they don't unlock the BMS.

So, to conclude, my friend bought a "new" battery that was most likely cut out of a used / dead macbook, which reports 3000mah as fully charged instead of the 6xxx mah that it should have, with 0 cycles and 0hours used.
And non default access.

This screams after those motherfuckers scaming the shit out of people on Amazon, with refurb, reset, and locked fucken batteries.

I could kill those people right now.

Last but not least,
My friend theoretically can't send it back because I opened the battery to fix the broken connection.
Though maybe, it'll get send back anyway, with some suprise in the package.

Got a call while on vacations, the main server is down.
*holy shit* I thought.
As I opened my MacBook, the phone kept ringing and slack was going crazy.

“What should I do? Where is the problem?”, the voices in my head said..

I opened the terminal and tried to get a ssh connection.
Sweat was dropping down from my forehead.

“Connected” the terminal said.

“Fuck yeah, the server is up, only the app is not responding”, I thought and opened the log files.

Suddenly, “STOP” I shout at the log files that were appended way too fast.

Then I saw it.
TimeOutExceptions..

I added an index to the modification date column,“ kill -9“ed the process, started again and went back to vacation mode 🙂

And of course I was the office hero for a while💪

For the smart asses, I’m aware that it’s a bad idea to -9 the app process in prod, but it was so overloaded that i was not able to kill it any other way. And we needed that server up again.

I get a call from a client at 7 PM:
- Client: We have a business partner that just visited the website you just made for us and he said it was absolutely terrible, things are not showing up, layout is all messed up... *sends photo*. This is a VERY important new business partner and this will affect our relationship and image. Fix it NOW!
- Me: ok? I will check ... *proceed to check on several browsers and versions*
- Me: I checked on all modern browsers, cleaned cache, tried from multiple devices, it seems to be fine. What browser is your partner visiting the site from?
- Client: Idk, let me ask ...
- Client: Internet Explorer
- Me: ... that browser is not even supported anymore wth?!
- Client: We need it fixed!
- Me: ... *proceeds and hacks for IE website until 6 AM*

I seriously love rsync. Whoever made that utility is my hero. Not only that its CLI client is amazing and full of features, but rsync in daemon mode makes secure file synchronization a breeze! <3

You know morons are in control when they block you, and you can just browse in private mode to see all their shit & them backstabbing you after the fact...

Hero behind a keyboard 🤦‍♂️🤷‍♂️