Battery life of 15 Minutes after Firmware Upgrade

Now that my system has had the firmware upgrade, I dont get more than about 5 minutes of battery life.
Prior to that I was getting a good 2.5-3 hours ish.
Now, it dies after 5 minutes.
I find it suspicious that this happened immediately after the FMC firmware upgrade.
I understand that the firmware cannot be downgraded easily.
Or is there, please let me know.

Recently my battery on my 15" MacBook started reporting 75% in the OS but the system would shutdown without notice -- also, when I put the computer to sleep (sometimes for only 20 minutes) it would completely lose its charge and shut down.
This started happening after I loaded the new firmware, but I thought it was related to a failing battery, not the FW update… now I’m curious.
I purchased a new "spare" and sent the original one back to Apple for testing. The spare has not had any problems since, but it has only been a few days. I've heard nothing back on the other battery.
I’ll post back if I have any problems with the replacement.

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