Iphone 6s Battery suddenly draining

https://www.payetteforward.com/why-does-my-iphone-suddenly-turn-off-even-though-still-have-battery-life-remaining-heres-the-real-fix/

The battery indicator turns yellow orange to indicate that your iPhone is in low power mode to reduce the drain on an almost empty battery. Even after you plug in to charge it, the indicator won’t turn green till your battery level reaches 80%.

I have been frustrated by the demise of the performance of my iphone 6s for over a year. Being a creature of habit I have managed to fairly scientifically determine possible causes.

Situation:

I purchased an iphone 6s new from the apple store in June 2017

Since being available the maximum capacity shown in battery health has been fixed at 82%

Usage:

I charge my phone overnight and use it for reading the newspaper in the morning and then use strava and a bluetooth heart rate monitor to track my morning commute. I will use for music streaming with spotify during the day as well as the occasional email / text or phone call. I track my return journey using strava along the identical route in the evening.

The issues:

Battery percentage falling rapidly - the percentage of battery power will tick down every few seconds when being used during morning commute.

iphone will crash at exactly the same point on my morning commute using strava - this is not impacted by battery level, changing to battery saver mode, disabling wifi or bluetooth (not great when trying to use a HRM).

When restarted following a crash the phone will either crash again once unlocked or show the charge battery symbol. Once connected to a charger it will restart and show a battery percentage at the level prior to the crash.

Curious to note:

When I do the reverse journey in the evening using the exact same settings my battery usage will differ greatly from the morning performance. I commute by bike from south west London into the City, in the morning at peak commute hours (between 08:00 - 09:00). In the evening I usually leave after the peak commute (19:00-20:00). When I leave during off-peak hours my battery usage on the identical route can be less than 3% with no crashes. If I leave work earlier the performance matches the morning.

Partial solution:

I have managed prevent the crash problem by disabling mobile data. The battery percentage will decrement at a lesser rate than the normal morning level but greater than the evening usage. Once home and connected to my wifi the phone will usually crash and only restart with the power, returning to it's previous level.

The statistics provided via battery usage seem bizarre and I suspect there is a limited value in this data and it is simply allocating the amount the battery has reduced in the time period by the number of apps in a simple weighting. I would have expected that the OS would appear on this list either directly or through related actions on wifi / mobile data usage but this is presumably lost in the app allocation.

I have disabled the performance management feature to see if this makes any difference to my issues however this feature has no impact on any of these issues.

My suspicion is that the effort of trying to connect to cell masts / wifi hotspots is at the root of this problem as this would explain why the identical usage at different times is so inconsistent, with London being highly congested, especially given the fact that it will crash at the same physical location when enabled. What I find frustrating is the lack of transparency or ability to manage this at a level other than on or off.

I am in the process of getting a replacement battery which I hope gives me some (most likely temporary) relief although given that this has been a persistent issue since the battery was less than a year old I am not overly optimistic.

My overall impression is that there are known issues with older phones and the iphone 6s in particular. I had an identical phone from my former employer which, like my current phone when first purchased performed perfectly well under the same conditions for a period of several years. Since the only variable in the equation has been changes in iOS I must assume that this is where the performance problems were introduced. It is amazing that performance of a simple task can degrade to the point of rendering the device defunct in such a small time frame (written on an 8 year old acer laptop that I can still use for my basic needs).

On a lighter not, having a family of 5 iphone users including myself, the move to an android device for my son earlier in the year (google pixel 2 plus - £629) has been completely without any issue (barring getting his icloud email to work on an android device - much harder than enabling my google mail on the iphone). In fact my mother-in-law appeared at Xmas with a Huawei Mate and required no more support than on her previous iphone 5s (which was provided by the 12 year old). Cheaper, faster and better? User friendly??

Apple were built on the concept of paying a premium for a better user experience, my personal experience is that the offering is now paying a significant mark-up for a worse experience, which is not a great position to be in.

is this an old issue or just since uploading latest iOS in December?

since downloading the latest iOS both my wife and my iPhone 6 have been draining battery overnight or after a few hours use during the day

I have this too. When I check the battery usage, then 99% of the usage comes from Skype. Even when you do not use Skype (Like during the night), Skype takes all the battery usage.

Hi

You need a new battery Make an appointment at Apple store or authorised apple repairer.

Cost is £25 /$29 dollars

Cheers

Brian 🇬-1F1E7;