Two month old rMBP 13- battery drops from near full to near empty

Hi All,
I have a rMBP 13 I bought brand new in December. Last night I closed my computer with ~80% charge, and just opened it up today (about 18 hours later) and the battery was at 7%. This has happened a few times in the last few weeks. Anyone have any thoughts? My cylce count is only 55 and I generally take good care of the battery (usually run it down before charging it again).
Thanks

First perform a SMC reset:
http://support.apple.com/kb/ht1446
Next read the following articles regarding MBP batteries:
https://www.apple.com/support/macbookpro/batteries_power/
http://support.apple.com/kb/ht3964
jrc3735 wrote:
(usually run it down before charging it again).
That is NOT advisable.
Ciao

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ADSL Line Status
Connection Information
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0 days, 00:42:29
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Upstream:
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ADSL Settings
VPI/VCI:
0/38
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PPPoA
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G.992.5 Annex A
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Interleaved
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Line attenuation (Down/Up):
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Output power (Down/Up):
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CRC Events (Down/Up):
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I connected a wired phone to the test socket and did a line noise test and it was dead quite :-) I have changed the RJ11 cable and left it plugged into the test socket through a ADSL filter. I have no extentions or wnything else running of that socket. My readings are as follows.
ADSL Line Status
Connection Information
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11.4 Mbps
Upstream:
1.125 Mbps
ADSL Settings
VPI/VCI:
0/38
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PPPoA
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21.6 dB / 10.4 dB
Output power (Down/Up):
20.9 dBm / 12.5 dBm
FEC Events (Down/Up):
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CRC Events (Down/Up):
2 / 32
Loss of Framing (Local/Remote):
0 / 0
Loss of Signal (Local/Remote):
0 / 0
Loss of Power (Local/Remote):
0 / 0
HEC Events (Down/Up):
1 / 7
Error Seconds (Local/Remote):
2 / 0
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Two month old rMBP 13- battery drops from near full to near empty

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