Help me fix this MacBook Pro!

[MrBojangles]

So I did a data-recovery job for a client who spilt liquid on a MacBook Pro 13" Retina 2013 model. After the job was done I offered to take the computer as a payment, to which the client agreed (it wouldn't boot).

So I took it back to the shop and went to town cleaning this thing. I took out literally everything and cleaned it with electronics cleaner.

The miracle happened and it booted up! Two problems though.

1. It's slower than expected

2. Won't run on battery, battery won't charge

Okay so after researching I've found that problem nr.1 can be cause by problem nr 2. so let me spell out the details.

* Magsafe contact stays orange indicating that it's charging
* Battery is at 83% now. Yesterday it was at 84% so it's discharging slowly.
* Battery icon in top right corner says "Replace battery now"

And here's a screen dump from the program CoconutBattery for some extra info on the battery.

Would be truly thankful for any tips from any Apple-pros around here. Im mostly a Windows guy but I do use a Mac. My hope is that the battery just went bad and I can simply replace it?

 

[trevm999]

Pretty much any hardware problem can cause a macbook to run slow. (Once I replaced a display clamshell and the new one caused it to run slow, replaced it and everything is good to go)

I'm betting this is a logic board issue. I've seen something similar before. Even though I just said in another thread that 99% of the time it's the battery, given the circumstances I'd say it's most likely the logic board. Can you try running it with the battery disconnected? It won't really prove much but show you both issues are related.

Not that it couldn't be just the battery causing both issues, it could.

 

[Krynn72]

Hope you have microsoldering equipment and skills.