Battery not recognised after ram upgrade - Help!

I just attempted a Ram memory upgrade that worked fine, but my battery stopped being recognised.
The battery was fine before, even so - I bought a new one (I tested in a different computer - it worked there) - still doesn`t work.
I decided to put back the old RAM - still no working Battery.
Reseted the SMC and the NVRAM 500 times and nothing changes.
Already have the latest Firmware (Efi and SMC) for quite a long time, can`t reinstall it or downgrade it (due to apple.). Apparently CD firmware restauration not available to my model ( original installation cd don`t work beacuse it is a previous version of firmware?)
What else can I do?
Is there any way to force a firmware installation ?
Macbook Pro 13`` (8.1- early 2011)
I7 -2.7ghz
8gb
500gb
OSX Mavericks

Run an Apple Hardware Test:
http://support.apple.com/en-us/HT201257
Note an error free AHT is not definitive.
Check the connections on the MBP and the charger for dirt, debris and discoloration. The pins on the charger are spring loaded and should move freely.
Ciao.

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Welcome to Apple Discussions!
This sounds like the RAM installed was either not to spec, faulty, or the installer missed a step. Take it back to the store and indicate to them what happened.

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I'm sorry if the case has been already posted.
Yesterday I took my MacBook Alu unibody late 2008 to a RAM upgrade (from 2 to 4gigs) to an offical Mac Reseller. They installed it and showed me that the system loads properly and recognized the new RAM.
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Today i didn't get the BAD ram alarm but the grey screen and loading bar after shutting down.
I took it back to the reseler, the shop boss who did the upgrade wasn't there , the guys on the morning shift placed the old RAM back resulting the same. So they told me it's a software problem, not hardware and might be caused by a failed firmware update or something i did wrong and since i was showed that the system booted after the upgrade i can't complain or argue that they did somethiing wrong.
So basically the want 80euros to check what's wrong with my computer plus the 120 i already payed them for a RAM that doesn't work and of course the repair cost of the computer.
On monday i'll go to talk to the boss, what do you guys recomend me to tell him? i'm frustrated that the guys there treat me like if i broke my computer for beeing stupid and wanted to get it fixed for free, when it clearly broke after they did something wrong on it!
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thanks!
Message was edited by: finn bell

What brand is the RAM? From what you said, it is obvious that the RAM is at fault. I would simply tell them that it is not compatible and return the RAM.
Check the System Profiler to see what it says about the RAM (Apple Logo - About this Mac - More Info) and run this application to test the RAM:
http://www.memtestosx.org/joomla/index.php
If either shows any errors, print out the results and take them with you to the store.

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My first two thoughts
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• Wrongly inserted RAM - Can be tricky and sometime not obvious - everything's looks OK but in certain situations it just randomly don't work.
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Battery not recognised after ram upgrade - Help!

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