MBP Not Charging

I have a mid-2011 MBP Pro that works great except sometimes it won't charge. It happened about 3 months ago and it's now happening again where it won't charge - testing it with 2 different chargers - until I leave it for a few hours and then it works. Could I have a defective battery? It hasn't happened enough to where I think it's that bad, but maybe this was an issue among this model.

Battery Info:

Model Information:
Serial Number: W01054MHFD3BA
Manufacturer: SMP
Device Name: bq20z451
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 0201
Hardware Revision: 000a
Cell Revision: 0158
Charge Information:
Charge Remaining (mAh): 2856
Fully Charged: No
Charging: No
Full Charge Capacity (mAh): 5391
Health Information:
Cycle Count: 104
Condition: Normal
Battery Installed: Yes
Amperage (mA): -1348
Voltage (mV): 11248

It's a mid 2011 model? Take it to Apple. It's still under warranty.