I am using a MacBook Pro 15" Mid-2015, running macOS High Sierra 10.13.3.
The current cycle count is 505, and battery "State of Health" according to coconut Battery is 85.2%.
Here is the battery information as displayed by the system report:
Battery Information: Model Information: Serial Number: Manufacturer: SMP Device Name: Pack Lot Code: 0 PCB Lot Code: 0 Firmware Version: 702 Hardware Revision: 1 Cell Revision: 3241 Charge Information: Charge Remaining (mAh): 6316 Fully Charged: No Charging: No Full Charge Capacity (mAh): 7460 Health Information: Cycle Count: 505 Condition: Normal Battery Installed: Yes Amperage (mA): -1269 Voltage (mV): 12124
I suspect some unusual activity with the battery which is not normal. Half an hour ago the battery was fully-charged, it is now at 84% charge.
I'm not running any energy-intensive app, as determined by the energy tab in Activity Monitor app, as shown in the illustration below:
Additionally, my MacBooks dies without any warning. macOS used to notify of low charge previously, but now it just dies without any notification.
I've never seen the percentage when it dies but I am suspicious that the battery isn't hitting 0%.
How do I resolve the issue.