Likely the milage of driving up and down the driveway is much worse than 
actually driving somewhere.

The calculated range is based on how much energy used in the previous several 
miles.

She just needs to go for a drive to correct the calculation

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On 4 Feb 2021, 03:55, at 03:55, Bill Dennis via EV <[email protected]> wrote:
>She leaves the car plugged in all the time, even after it's fully
>charged.
>She uses 110V charging.
>
>Bill
>
>-----Original Message-----
>From: EV [mailto:[email protected]] On Behalf Of Peri Hartman
>via EV
>Sent: Wednesday, February 3, 2021 12:32 PM
>To: Electric Vehicle Discussion List
>Cc: Peri Hartman
>Subject: Re: [EVDL] Pandemic Cell Fade
>
>What does the Volt charger do at full charge and the cable stays
>plugged 
>in ? Does it periodically recharge as parasitic uses discharge the 
>battery ? What is her charging pattern and what was it before the 
>pandemic ? It could be that, after one year, constant recharging to
>100% 
>damaged the cells. What Just pure speculation.
>
>Peri
>
><< Annoyed by leaf blowers ? https://quietcleanseattle.org/ >>
>
>------ Original Message ------
>From: "Glenn Brooks via EV" <[email protected]>
>To: "Electric Vehicle Discussion List" <[email protected]>
>Cc: "Glenn Brooks" <[email protected]>
>Sent: 03-Feb-21 11:26:39 AM
>Subject: Re: [EVDL] Pandemic Cell Fade
>
>>One of the Battery cells going bad, maybe.
>>
>>Sent from my iPad
>>
>>>  On Feb 3, 2021, at 11:14 AM, Bill Dennis via EV <[email protected]>
>wrote:
>>>
>>>  Pre-pandemic, when my mother-in-law charged her 2017 Chevy Volt, it
>would
>>>  have about 60 miles electric range.  Throughout the pandemic, she's
>done
>>>  nothing with the car except drive it to the top of the driveway and
>back
>to
>>>  check the mail.  When we were finally able to get to Georgia to
>visit
>her
>>>  this week after fifteen months, I notice that a full charge shows
>only
>40
>>>  miles range now.  Anyone ever notice anything similar, or have any
>guess
>>>  why?
>>>
>>>  Thanks,
>>>
>>>  Bill
>>>
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