Battery life suddenly bad while idle at 80%

Hey guys,
I have a macbook pro that I got about a month or two ago and the battery life has been great until about two days ago, I used to see a full charge carry for 5-6 hours now it's 2 hours if i'm lucky, as far as I know the only thing that has changed is installing apple updates which I doubt would cause my battery life to tank suddenly. My running conditions haven't changed, i've usually got the backlight low with dim keyboard light, wi-fi on and not running anything intensive as you can see below, just a code editor and some communication programs.
here's sample output from running top in a terminal
Processes: 87 total, 5 running, 82 sleeping, 472 threads                                                                                                                                                                            12:20:54
Load Avg: 1.24, 1.21, 1.13 CPU usage: 7.79% user, 5.19% sys, 87.1% idle SharedLibs: 7652K resident, 8160K data, 0B linkedit. MemRegions: 13809 total, 1109M resident, 32M private, 364M shared.
PhysMem: 894M wired, 1318M active, 243M inactive, 2455M used, 1635M free. VM: 193G vsize, 1040M framework vsize, 191238(0) pageins, 0(0) pageouts. Networks: packets: 35325/18M in, 32604/6758K out.
Disks: 80275/1782M read, 22422/744M written.
Here are the specs on the laptop
Hardware Overview:
Model Name:          MacBook Pro
Model Identifier:          MacBookPro8,2
Processor Name:          Intel Core i7
Processor Speed:          2 GHz
Number of Processors:          1
Total Number of Cores:          4
L2 Cache (per Core):          256 KB
L3 Cache:          6 MB
Memory:          4 GB
Boot ROM Version:          MBP81.0047.B04
SMC Version (system):          1.69f1
Serial Number (system):          C0***V
Hardware UUID:          0DCE12E1-6114-53C0-B618-CB75D451C706
Sudden Motion Sensor:
State:          Enabled
Does anyone have any insight or tools I can use to diagnose this further?
Thanks!

I tried that last night to no avail, but I found the answer. The dock had been running at 100% after the upgrade (don't know why it didn't show up in top, but showed up in activity monitor) so I followed this thread ( https://discussions.apple.com/thread/3138432?start=0&tstart=0 ) and now I'm back to expected battery life

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Cool
Did the new device and didn't do a restore from backup. Grabbed all my contacts from windows contacts saved list. So only thing the same on the phone was the same 4.2.1 that stays in there. Still bad signal and battery life, although the battery problem might be the age of the battery since its the same battery that came with the 3G.
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- Press the Call button
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In my house im getting any were from -100dBm to -117dBm ( 1 to 2 bars with 3G)
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http://www.iphonebatteryrepair.com/iPhone-3G-Battery-p/bat-1001.htm
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Sorry for the long post but I think I kept it faily organized for a easy read, I hope.
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Also when i tried logging in from Lumia 920 to post this message, the popup login on the sign in doesnt work. Also when you post the scrolling doesnt work really well like on the desktop. Not sure if its the site issue or IE10 issue
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Battery life suddenly bad while idle at 80%

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