My battery stops charging at 73%

[KHurtado]

Hi,

When I connect the AC adapter, it only charge until arround 73%  then it stopped charging; when battery percent goes down it start charging again. The battery icon shows plugged but not charging.

I tried deleting the drivers and checking the battery using the HP Support Assitent, HP PC Diagnostics Tools and using HP PC Diagnostics UEFI (both charging and plugged but not charging). In all of the case the result was Ok.

I am copying the result of the last test I did. I realised that it shows that my capacity of charging is 73%. Is this correct? shouldn't it be 100%?

Thank you!

HP PC Hardware Diagnostics Windows Application

HP service is not installed.

DevicesSupported: 1 DeviceCount: 1

Primary_ACPowerOn: True

Primary_ACAdapterOk: True

Primary_TestresultString: OK

Primary_DesignCapacity: 2850mAh

Primary_FullChargeCapacity: 2105mAh

Primary_RemainingCapacity: 1453mAh

Primary_MaxError: 1

Primary_CycleCount: 124

Primary_Voltage: 16424mV

Primary_Current: 1653mA

Primary_DesignVoltage: 14600mV

Primary_Status: 128

Primary_CellVoltage1: 4084mV

Primary_CellVoltage2: 4040mV

Primary_CellVoltage3: 4182mV

Primary_CellVoltage4: 4084mV

Primary_SerialNumber: 04164 09/29/2015

Primary_ManufacturerName: 131-42-6E

Primary_BatteryCTNumber: 6EZRVC29J9K38O

Primary_Warranty: 1

Primary_CalibrationType: 3

Primary_ChargeControl: Supported

Primary_TempCharge: True

Primary_ChargeTest: True

Primary_ChargeCapacity: 73

Primary_TempAlarm: False

Primary_DeepDischarge: False

Primary_FullCharge: False

Primary_FullChargeStatus: False

Primary_BatteryCharge: True

Primary_DesignCycleCount: 300

[steviejay]

There may be a charging option in your BIOS that optionally does not charge the cell to 100% capacity (e.g. if it is left on the charger for extended periods).

If this is in fact operating then changing the setting should allow the cell to display 100% charge.

A reduction of charge capacity lower than the design capacity is normal with a cell that is aged (time or charge/discharge cycles). You should replace cells that have less than 60% design capacity (40% wear).

Occasionally, a calibration utility will exist in BIOS, you may also make use of this (steps will be clear in BIOS on what to do) or you may require a 'calibration charge' where you allow the battery to run to it's Low Battery setting (typically 7% charge) but not to Critical Battery (typically 5% charge).

You then charge the battery to 100% (faster if done in OFF or STANDBY) and it should allow the software to more accurately report the discharge level and the Low Battery level.

Shallow charging is then recommended (charge to 100% from 50% or more and remove the charger at 100%) until the occasional calibration charge (monthly or quarterly).

Do not run the cell flat (exhausted) this is damaging to the make up of the cell.

[Huffer]

The battery has got some miles on it and only has 73% of its designed capacity which for some reason is also the registered percentage where it stops charging. So you have 73% of 73% of original capacity. Is the battery utility offering you to calibrate? 

Basically the battery is still functional but is tired and your computing experience would be enhanced with a new battery. Post back if you need any help with that.