Question on Battery Test Results for HP Notebook - 15-da0073wm

[Mizmelzy]

I noticed my battery was plugged in and should have been at 100% but noticed it says 99% available (plugged in).  If it's fully charged shouldn't it say 100% available (plugged in)?  I did a battery test to see if it could be battery related at all.  I got the laptop in July.  It is HP Laptop 15-da0073wm. When I did the system test which tests the battery it shows this for a result.

TestVersion = 1.17.5.0

TestId = a088469f-b159-4d7e-b4f9-0f1ed77a95af

StartTime = 2020-10-24T13:28:22

ExecutionDuration = 00:00:36 Result =

ExecutionPassed PassID = 29978-83610-93358 ==================================================

CeementBatteryCheckResult: 11

DevicesSupported: 1

DeviceCount: 1

Primary_ACPowerOn: True

Primary_ACAdapterOk: True

ACAdapterStatus: False

Primary_TestresultString: OK

Primary_DesignCapacity: 3615mAh

Primary_FullChargeCapacity: 3428mAh

Primary_RemainingCapacity: 3370mAh

Primary_MaxError: 1

Primary_CycleCount: 7 Primary_Temperature: 34deg C

Primary_Voltage: 13167mV

Primary_Current: 445mA

Primary_DesignVoltage: 11550mV

Primary_Status: 128

Primary_CellVoltage1: 4383mV

Primary_CellVoltage2: 4386mV

Primary_CellVoltage3: 4394mV

Primary_CellVoltage4: 0mV

Primary_SerialNumber: 38332 04/22/2018

Primary_ManufacturerName: 333-54-5D-A

Primary_BatteryCTNumber: 6GYTF42AQAQRFH

Primary_Warranty: 3

Primary_CalibrationType: 3

Primary_ChargeControl: Supported

Primary_TempCharge: True

Primary_ChargeTest: False

Primary_ChargeCapacity: 94

Primary_TempAlarm: False

Primary_DeepDischarge: False

Primary_FullCharge: False

Primary_FullChargeStatus: False

Primary_BatteryCharge: True

Primary_DesignCycleCount: 1000

Shouldn't the Primary Charge Capacity be 100? If not, why is it 94?  The test says it passed but not sure why it states that the Primary Charge Capacity is 94?

Thanks!
Melissa

[banhien]

@Mizmelzy 

As you can see

• Primary_DesignCapacity: 3615mAh
• Primary_FullChargeCapacity: 3428mAh

Therefore 3428/3615 = .94  or 95% (round up). All batteries are very hard to get 100% DesignCapacity. You only get 99% because the magic numbers above .94/.95 roughly = 99%.

Regards.