HP ENVY 15t-as100 CTO (W0Q62AV) battery drains even when powered off.

[RichardEP]

The battery in my HP ENVY 15t-as100 CTO in the last couple months has begun to fail. It discharges from 100% to about 1% over 3 weeks or so while powered off! Note again: While powered off!

And. of course, it began doing this only after the warranty expired.

Has anyone else experienced this problem?

[Huffer · Accepted solution]

Yes you are not the first to notice this. Here are some suggestions from a 3rd party site:

https://windowsreport.com/battery-drain-shutdown/

On laptops with an internal battery there is no CMOS or clock battery so the main battery keeps a very slight trickle of power to the motherboard to keep the time. This accounts for less than 1% per day. If you have usb devices connected or if the laptop appears to be off but is really in a hybrid sleep state (which Windows 10 wants to do by default so it appears to boot up more quickly when you turn it on) you will also lose a bit. As the battery gets older it can go from 1/2% per day to 3 or 4% per day being lost and before you know it you get to the point where its drained after a few weeks of sitting unused. 

You should run a full battery diagnostic in HP Support Assistant and report the advanced results back to us. 

[RichardEP]

Battery check results:

CeementBatteryCheckResult: 11
DevicesSupported: 1
DeviceCount: 1
Primary_ACPowerOn: True
Primary_ACAdapterOk: True
Primary_TestresultString: OK
Primary_DesignCapacity: 4560mAh
Primary_FullChargeCapacity: 4560mAh
Primary_RemainingCapacity: 3329mAh
Primary_MaxError: 0
Primary_CycleCount: 24
Primary_Voltage: 13149mV
Primary_Current: 912mA
Primary_DesignVoltage: 11550mV
Primary_Status: 130
Primary_CellVoltage1: 4381mV
Primary_CellVoltage2: 4381mV
Primary_CellVoltage3: 4391mV
Primary_CellVoltage4: 0mV
Primary_SerialNumber: 17620 10/18/2016
Primary_ManufacturerName: 313-54-4B
Primary_BatteryCTNumber: 6FRJH31CF48MJH
Primary_Warranty: 3
Primary_CalibrationType: 1
Primary_ChargeControl: Supported
Primary_TempCharge: True
Primary_ChargeTest: True
Primary_ChargeCapacity: 100
Primary_TempAlarm: False
Primary_DeepDischarge: False
Primary_FullCharge: False
Primary_FullChargeStatus: False
Primary_BatteryCharge: True
Primary_DesignCycleCount: 1000

I was a little worried about Primary_CellVoltage4: 0mV until I remembered it has only 3 cells! <smile>

If it makes any difference, the battery was, perhaps, a third charged when I ran the test.

Following the discussion in your recommended article, I:

- Turned off Connected Standby. (I never purposely enable any kind of sleep mode anywhere.)

- Updated the BIOS from F.56 to F.58revA.

- Turned off fast startup. (I have SSDs, it boots plenty fast enough!)

[RichardEP]

I performed everything suggested in the referenced article. I delayed my response to see the impact of changes made.

And success!

After two weeks, I turned on my laptop and had 100% remaining in the battery. Thank you for your help.