Battery problems?

I just bought my macbook pro last week. Yesterday I shut it down with 100% battery and today when I turned it on, the battery level is 99%. Is this normal? It was a full shut down and not in its "sleeping" mode.

Here are my battery info:

Battery Information:

Model Information:
Serial Number: W02234HEXD3LC
Manufacturer: SMP
Device Name: bq20z451
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 201
Hardware Revision: 000a
Cell Revision: 165
Charge Information:
Charge Remaining (mAh): 5630
Fully Charged: Yes
Charging: No
Full Charge Capacity (mAh): 5690
Health Information:
Cycle Count: 1
Condition: Normal
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 12477

System Power Settings:

AC Power:
System Sleep Timer (Minutes): 13
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 13
Wake on AC Change: No
Wake on Clamshell Open: Yes
Wake on LAN: Yes
Current Power Source: Yes
Display Sleep Uses Dim: Yes
PrioritizeNetworkReachabilityOverSleep: 0
Standby Delay: 4200
Standby Enabled: 0
Battery Power:
System Sleep Timer (Minutes): 3
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake on AC Change: No
Wake on Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Standby Delay: 4200
Standby Enabled: 0

Hardware Configuration:

UPS Installed: No

AC Charger Information:

Connected: Yes
ID: 0x0100
Wattage (W): 60
Revision: 0x0000
Family: 0x00ba
Serial Number: 0x00e29251
Charging: No

Last week something similar happened too. But it continued to drop. By the 3rd day it will be drop to 97%. Subsequently, till below 95% and it will recharge via power.

Ok, thanks a lot!