I hounded Dell for months and got them to replace I guess 2 or 3 dozens of Optiplex DL270 motherboards and it felt good: forcing them to take the cost for their shoddy work.
I do wish there was a little more of treating your users like adults though. If I have enough battery to make an urgent call, but it puts me under the 20% recommended, I want to make that call at the cost of long term battery life.
My products treat users like adults, I wish it was a more common consideration.
I just replaced that phone, and yes with another one because I happen to like that model a lot, and my old one did 1500+ cycles with respectable battery capacity remaining. I replaced it due to a cracked screen, not battery trouble.
My general experience has been to avoid fully charging the battery and leaving the device on the charger, plus avoiding high demand use under 15 to 20 percent adds very considerably to longer term battery health.
This has played out across a number of devices, lenovo laptop, various phones.
After, say a few hundred cycles, it's very important to avoid taking the battery below 5 percent or even to zero. When that happens, the battery capacity is reduced every time, and it's by a significant amount.
http://learningrc.com/wp-content/uploads/2017/02/Lipo-Discha...
Battery capacity is guessed by the Voltage output at the current draw when measured.
Laptops usually throttle components, reducing current draw, when they fall below certain percentages. This prolongs the battery so that last 10% really does last longer.
This article goes into some nitty gritty details if you're curious.
http://learningrc.com/lipo-battery/
Determining actually battery capacity and runtime are educated guesses because all the factors impacting them are constantly changing.
I’m not sure many reviews are checking 0-60 times at 20% battery for example.
My EV has a hilarious “miles remaining” number that INSTANTLY changes when the HVAC is on, doesn’t matter if it’s only slightly on or not, I instantly “lose” 8 or 9%. It’s pretty loose. As to what I actually get? Doesn’t really matter, never even compared to rating, mfgs know we use these cars for city travel.
The small percentage of EVs you see on long haul highway, owners already know to carefully plan their trips.
This is double true for Tesla where there are superchargers nearly everywhere. With access superchargers, road trips are roughly as complex as driving a diesel with a 5-8 gallon tank.
Also the tesla UI is very good at managing the trip so it is trivial to offload the "how do I get there including charging" task to the UI.
