you’re also assuming 0-100% charge every night which most people won’t do. so very likely much more than 3 years.

the person above is also assuming 0-100% charge every day. most people won’t go through a whole battery charge every day, at least for the first couple years.

How so?
With heavy usage all my Samsung phones barely made it through a full day. I've never considered throttling the battery for the sake of longevity or been encouraged to by my phones.

When you do the initial setup it asks if you'd like to optimize for battery health and most people say yes. Most recently it wouldn't even tell you that it was only charging to 80%.It would still charge to a hundred but that would actually be eighty percent. Around a year ago they changed it so now it says eighty percent when you're at full charge if you have the battery health turned on.

If you turn on the battery over provisioning you would see the same battery life at about a year and a half and then after that the provision battery will last longer. After the exploding phone they also provisioned five percent of all batteries.

Awesome! Good to know its based off some kind of standardized testing. This is good for everyone!

I'm one of the outliers in that I do 80 to ~10 before the day is over, then I'll charge and keep going, or I keep it topped up on the wireless charger throughout the day. But overall I'm charging at least a full cycle daily. I use my phone heavily. 1.5y in and I started using the 80% cutoff for lifespan, but I haven't noticed a decline, it's preventative and not reactive.

Family member has my previous phone, 2.5y old, and has not complained to me about the battery. When it was in my possession it was the same use case/scenario. Their use case is lighter duty, but they leave the screen on for like 10 minutes after idle, never turning it off manually. Pain.

My previous previous phone was given to a sibling, 3.5y old, again when it was mine it got the same heavy use. They use a battery bank some days, but they can be an even heavier user than I am sometimes - discord voice and video chatting, games, even doing one while also on a desktop. 100 to 20 or less most days, I often see it in the evening in battery saving mode around 10% when they are reaching for the bank. But that's still with a few hours SoT and heavy use with socializing and games and stuff.

All 3 are pixel pros, 8/7/6. shrug

Is piefed an instance?

Piefed is both an instance (piefed.social) and back-end server software that allows anyone to run their own instance (list of various Piefed instances). It works on the same ActivityPub protocol as Lemmy and Kbin/Mbin so they all interoperate with each other.

One of the cool things I like about Piefed is it seems to join the comments of various instances in cross-posts. On Lemmy, you can see its crossposted, but you have to manually check them out to see any comments on others. One cool feature I like over Lemmy. There's a few others, but I'd encourage you to check it out. You don't have to commit if you don't like it.

It's all up to where you live and how you use the phone.

One day heavy usage is the goal. I charge my S24 to 80% but only lightly call, and moderate chatting. I can make it from 6am to 8pm and still have well over 25% when I get home. Little to no gaming or social networks though.

It helps that I live and work in an urban area with good antenna coverage. So the phone doesn't use too much power talking to the network. People who live out in suburbs and rural areas have worse phone battery life because the phone has to struggle talking with antennas further away. Battery life is complex and it goes beyond what personal anecdotes can show.

the actual legislation is not that specific as far as i can tell:

L_2023214EN.01000901.xml

(eur-lex.europa.eu)

Article 5

Measurement methods

The information to be provided pursuant to Articles 3 and 4 shall be obtained by reliable, accurate and reproducible measurement and calculation methods, which take into account the recognised state-of-the-art measurement and calculation methods, as set out in Annex IV.

Article 6

Verification procedure for market surveillance purposes

Member States shall apply the verification procedure laid down in Annex IX when performing the market surveillance checks referred to in Article 8(3) of Regulation (EU) 2017/1369.

I'm at 943 cycles on my Pixel 6 Pro and it's still going strong. I slow charge it every night and try to avoid fully draining the battery to slow down the deterioration, which seems to have worked pretty well. Thankfully a battery replacement is only $50 so it won't cost much when I do have to replace it.

I had the same phone, and the only reason I replaced it was because the USB C port was finicky. It must have been damaged at some point and when plugged in, the cable had to be just right. Wireless charging works great, but I wanted the stability of being able to plug in and know it would discharge over night when I didn't have a wireless charger. Otherwise, I had no issues with the battery, and I got the phone when it was pretty new to the market. I swapped it out just a few months back, and it's going to be my test phone for grapheneOS and may end up being a communal remote.

the actual legislation is not that specific as far as i can tell:

L_2023214EN.01000901.xml

(eur-lex.europa.eu)

Article 5

Measurement methods

The information to be provided pursuant to Articles 3 and 4 shall be obtained by reliable, accurate and reproducible measurement and calculation methods, which take into account the recognised state-of-the-art measurement and calculation methods, as set out in Annex IV.

Article 6

Verification procedure for market surveillance purposes

Member States shall apply the verification procedure laid down in Annex IX when performing the market surveillance checks referred to in Article 8(3) of Regulation (EU) 2017/1369.

Where can you see charge cycles?

Yeah I've got a P7 Pro and the battery is still fine. Adaptive charging enabled to help batter life.

Handed my P6 down to my daughter and it's still fine for her too

Settings -> About phone -> Battery information

Doesn't show charge cycles for me, sadly. Samsung A52

around 38C

I was shocked when my new realme, which uses the same tech, didn't even break 30°C while charging at 8+ Amps (should be around 80W). This was in a relatively warm room (25°C) and using the case that came with it, which surely doesn't improve thermals. It gets warmer when charging from other sources with only 2-3A, like USB-PD or QuickCharge.

Coupled with the fact that it's only accurate if you are constantly charging from below 15% to 100%, these are ranges that I rarely get my phone into.

AccuBattery needs a session to have 60% charged, so <20% to 80% works. Doesn't need to be every single one. I actually asked support about it and they said this was the lowest percentage they were comfortable with. I was requesting to make it adjustable.

Accuracy of the measurement isn't the entire point. I see the same issue, but since it helps track relative degradation over time it can still add value by giving more information when you suspect the capacity is getting worse.

Doesn't mean they use the same chemistry. There's a lot of different lithium batteries.

Samsung isn't even using the latest\greatest tech in cell phone batteries. The Redmagic 10 pro uses a silicon-carbon anode based battery in a dual cell form. It means fast charging is split between 2 batteries so there's less battery damage on a recharge, and the chemistry is more energy dense.

Also, it seems the cell phone companies self assess the tests and report them to the EU, so take the whole thing with a grain of salt.

It kind of isn't. The EU is giving the cell companies guidelines on how they should test their batteries, and then report their numbers back to the EU. So "Apple" are testing their apple phones and then telling the EU their alleged numbers.