OnePlus offloads heat to the charger

Some of it. They omit some circuitry that would have generated additional heat in the phone, and have it in the charger instead, but that doesn't magically mean the battery itself wont generate the inevitable heat caused by being charged faster. The battery itself only accepts one voltage, so the only way to charge it faster is amps.

And my feeling is that they aren't using the gains from this to make the batteries last, as SUPERVOOC is faster than pretty much every other standard. That makes me think they turned in any and all gains in battery health, for speed.

Most chargers send the additional energy via the cable in the form of extra voltage, because that doesn't require a special cable. Turning that voltage into amps in the phone produces a little bit of extra heat, but that doesn't mean that by eliminating that step, you get none from the battery itself as it charges. You can technically charge with a higher voltage, if you set up a phone such that it has more than one lithium cell. Some phones do this, but this doesn't require the OnePlus approach of using a special charger that provides a higher current, since any fast charger that can do the usual higher voltage method of providing extra power will work.

Like you say. I'm curious how they test this. Even if one battery gets more cycles, it'll degrade with time, as well. iPhones fast charge, too, but not with the chargers that used to come with the phones. You have to get one specifically for fast charging to get faster-than-normal charging.

Also, a tip. You may want to use something like AccuBattery to actually measure the state of the battery. Batteries, being chemical devices, have different capacities straight off the production line simply by virtue of not being chemically identically down to every molecule. (My Xperia 1 V unfortunately came with 93% design capacity, still within manufacturing tolerance, but the lowest I've seen on a new battery, it can be a bit of a lottery)

The built-in battery health monitor will just say "all good" until it isn't. AccuBattery has allowed me to monitor every percentage of degradation over the lives of my last few phones.

It's also wrong. That comment is misinformation.

They are lab tested by a 3rd party in the EU, SmartViser.

So if you charge nightly, basically like 3 years for a pixel? That's not really terrible, especially if using the a-series which is a decent value.

I'd prefer my phone to last longer than that for the price I paid (oh, wait. It's a Samsung, and it's already lived longer than that, lol)

And my feeling is that they aren’t using the gains from this to make the batteries last, as SUPERVOOC is faster than pretty much every other standard. That makes me think they turned in any and all gains in battery health, for speed.

There is a setting to explicitly benefit from using an official charger and cable, but I don't know if it's on by default (it's disabled on my phone).

That said, the heat while charging is about the same as the heat from holding the phone in my hand (around 38C), and doesn't get much hotter than that while gaming thanks to pass-through charging.

My Samsung was definitely hotter, and would overheat if charging while doing anything like GPS navigation. But my last Samsung was a Note 10+, and so things may have very well changed since then.

You may want to use something like AccuBattery

Already do, and have for years.

But AccuBattery doesn't seem to play nice with the OP13, with many users reporting lower battery health from the start (80-90%), and inaccurate capacity (<1000 mAh less than the designed capacity).

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.

Even though battery longevity is important to me, since I no longer replace my phones "every year", it really would be best if these damn things had user-replaceable batteries that were readily available.

I'd like my phone to last 5 years minimum.

That seems to be the new standard for continued software support too.
If the phone only lasts for half of that, what's the point?

Replacing the battery on a 9a is a invasive 64-step process(ifixit guide). The kit they sell is surprisingly cheap at $40, but has a list of other tools you need. Its definitely not a project most people will undertake.

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?