What does Settings : Battery: Battery Health Beta tell you?

Sent from Tim's iPhone

> On 25 Aug 2018, at 3:55 pm, Severin Crisp <sevcr...@westnet.com.au> wrote:
> 
> I shut down my iPhone 6 at bedtime each night and reopen it in the morning.  
> Often, though not always, on reopening it will come up with the dead battery 
> symbol despite having been put to sleep with 40% or more showing.   A fresh 
> attempt at restart may or may not yield success.  Several others have noticed 
> the same thing and claim that using only Apple cables and never letting 
> charge go below 50% will ensure continuous service.   
> Fine to know but why is this so?   
> Severin Crisp
> ____________________________________________________
> 
>              Assoc Prof R Severin Crisp, FAIP, FIP, CPhys
> 15 Thomas St, Mount Clarence, Albany, 6330, Western Australia 
>                     ph (08) 9842 1950  Mob  0484 624 741   
>                          mail to: sevcr...@westnet.com.au
>   _________________________________________
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