Best practice with respect to battery life

[Jx J]

I have an older Samsung tablet. When I first set it to not go beyond 80%, it said it was going to restart and then afterwards it would now display the 80% set level as 100%. I don't think I'd even know if it periodically went above what used to be 80%.

My Samsung tablet just never shows more than 80%. If it has done the occasional charge to 100% for battery calibration, I don't remember seeing it.
Therefore, that particular Samsung feature works exactly as I expect it to.

I just wish Google could manage the same thing.

 

[Jx J]

Others report this problem. See link.
Apparently the solution is to allow it to charge to 100% & wait a couple of house for a "Shield" to appear.

I have my doubts. Yesterday, before discovering this link (below), I left it on charge & forgot it. This must have been at 100% for hours. Today it is still charging past 80%.

https://support.google.com/pixelphone/thread/331756561/limit-charging-to-80-has-stopped-working?hl=en

 

[Jx J]

The implementation of this feature is even worse than I thought.

Apparently it needs to be charging with a cable for the calibration to succeed.

If using a wireless charger, it will still periodically attempt a calibration charge to 100%, but will not actually recognise this as calibrated & will continue charging to 100% for future charges.

This is all despite the charge indicator telling me the phone is at 100% charge after charging on my wireless stand.

Google have seriously fouled up the design of this feature.

(i) The calibration to 100% is far too frequent for my liking
(ii) What is the point of attempting a calibration charge to 100% on a wireless charger, if the software has no intention of recognising this as 100% charged & re-enabling the 80% limit afterwards ?

 

[spARTacus]

The Pixel has routines, correct? If so, you could set up a routine to stop the phone from trying to reach 100%. Have it stop charging at maybe 85% or 90% or something like that.

 

[Jx J]

They have made the 80% charge limit even worse with recent updates.
Now it seems to demand a charge to 100% every few days.
For example, as it was charging well above 80% on Sunday, I plugged in a cable and waited some time at 100%, before the shield came on.
On Friday, it was again charging above 80%. Just 5 days later !

I have sent the bug report to google.

I have none of this nonsense with my Samsung tab. That just stops at the defined limit and works exactly as I expect.

Prior to the implementation of the 80% limit, I just used to set the Pixel to charge for a fixed time with a plug in timer. I know 15 minutes adds about 15%.
If google choose not to write software to make an 80% limit work properly, I shall have to revert to the old method.