I recently installed a new battery in my early 2013 MBP 15" Retina. I put it through the recommended two complete charge/discharge cycles, and coconutBattery reports that the design capacity is 8460 mAh and the full charge capacity is 8942 mAh. (I think that's good.) The cycle count is now 7.
When the remaining charge reaches around 12%, the screen abruptly goes black. When I plug in the A/C adapter, I immediately hear the startup bong and the machine boots back up. I've looked for Console messages and haven't seen anything. And I have done the SMC reset.
The fact that it turns off without any warning suggests to me that the problem isn't simply miscalibration, but what do other people think? Should I just persist in this draining/charging routine a bit more?