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Comment by bob1029 | Hacker News Reader

I feel like Apple pulled an Instant Pot with the M1 MacBook Pro. I still haven't had a single situation where I felt like spending more money would improve my experience. The battery is wearing out a bit, but it started out life with so much runtime that losing a few hours doesn't seem to matter.

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> The battery is wearing out a bit, but it started out life with so much runtime that losing a few hours doesn't seem to matter.

this is my exact opposite experience. my M3 Max from 2 years ago now has <2hrs battery life at best. wondering if any experts here can help me figure out what is going on? what should i be expecting?

As others have said, keep the battery in the 80%-30% range. Use the `batt` CLI tool to hard limit your max charge to 80%. Sadly, if you're already down to <2hrs, this might not make sense for you. Also prevent it being exposed to very hot or cold temps (even when not in use)

I type this from an M3 Max 2023 MBP that still has 98% battery health. But admittedly it's only gone through 102 charge cycles in ~2 years.

(use `pmset -g rawbatt` to get cycle count or `system_profiler SPPowerDataType | grep -A3 'Health'` to get health and cycles)

> I type this from an M3 Max 2023 MBP that still has 98% battery health.

That's amazing. I have an early 2023 M2 Max MBP that mostly charges in desktop mode, which limits to 80%. I just looked in battery health and it says 82%. Damn! :(

For giggles, earlier today I asked Apple how much they'd give me for this machine if I traded it in on a brand new $5K M5 Max equivalent. $825. Ouch. I think I will keep it for a few more years. 96GB is enough memory to do anything I want, and it's been such a great performer that it's easily my favorite MacBook ever. I do wish the battery weren't so degraded though.

For anec-science, here goes:

  % pmset -g rawbatt
  03/03/2026 18:29:51
   AC; Not Charging; 76%; Cap=76: FCC=100; Design=6075;   Time=1092:15; 0mA; Cycles=63/1000; Location=0;
   Polled boot=02/09/2026 07:24:50; Full=03/03/2026   18:24:52; User visible=03/03/2026 18:28:52

  % system_profiler SPPowerDataType | grep -A3 'Health'
        Health Information:
            Cycle Count: 63
            Condition: Normal
            Maximum Capacity: 82%

Your battery is defective if it's at 82% after 63 charge cycles. My M1 Pro has 87% capacity after ~5 years and 412 cycles of giving zero fucks and regularly draining the battery all the way down to almost 0% and charging back up to 100% every time. I plug in to charge at like 2% super often. Babying the battery doesn't make any sense IMO.

I agree. Apple may even replace out of warranty

I'm at 100% after 128 cycles. You should go to an Apple Store.

The option to have a 80% cap is being added in the beta versions of MacOS. I think within a few months it should be available to general users without using extra tools.

I set Claude loose on my computer and said “why is my battery life so bad?” and it found an always-running audio subsystem kernel extension (Parrot) which didn’t need to be there and was preventing the CPU from going into low-power states. My battery life got noticeably better when I deleted it.

I’m not even sure how it got installed, possibly when I installed Zoom for an interview once but I don’t know. Point is, at least in one case, AI can help track down battery hogs.

What is your maximum capacity in Settings > Battery Health? What processes are running with significant CPU? What's the typical temperature of the laptop according to a stats app? (Temperature is a good proxy for general energy use.)

I'm typing this on an M3 Max; its max battery capacity is 88%. I've got some things running (laptop average temp is 50-55C, fans off), screen is half brightness, and it's projected to go from 90% to 0% in five hours. I don't usually baby it enough to test this, but 8-10 hours should be achievable.

Either your battery was defective or something is using all your battery. Even my 2018 Intel MacBook still lasts 3+ hours on a charge.

Apple will replace the battery for $249 if you choose to. https://support.apple.com/mac-laptops/repair?services=servic...

People here are suggesting limiting your battery charge as a proactive measure to prevent degradation but an M3 is far too new for you to be getting so poor battery life from use, even if you spent all day every day charging and discharging it.

The only plausible answers are either: something you’re running is eating CPU/GPU cycles like crazy (browser tabs gone amok, background processes) or you have a defective battery. Use Activity Monitor to look for energy usage and that will give you a pretty good idea.

This. The issue is not your battery but something running in the background.

I've got a M2 Pro from 3 years ago and battery is still so good I can go to a whole day of meetings and not even need to bring my charger. Then I can probably work all night as well without plugging it in. Battery time is insane.

Unless of course you're doing something that truly sucks down your battery! If I spin up a few Docker instances doing 100% CPU then obviously battery will go down much quicker.

Charge habits with batteries make a huge difference. If your use pattern is that once per day, you take the device from 100% to 10%, you put a lot more wear on the battery than if it kind of hovers in the 30%-80% range for example, or if it just hangs out nearish top-of-charge all day when you're at your desk.

Hot take: people should get used to, and expect to, replace device batteries 1 or 2 times during the device lifetime. They're the main limiting factor on portable device longevity, and engineers make all kinds of design tradeoffs just to make that 1 battery that the device ships with last long enough to not annoy users. If we could get people used to taking their device in for a battery once every couple of years, we could dramatically reduce device waste, and also unlock functionality that's hidden behind battery-preserving mechanisms.

BatFi is a macOS application which will prevent your battery from charging to over 80% by default. macOS does have a version of this built-in but it’s “intelligent charging” I don’t really trust, and I’d rather just have a hard 80% limit except when I override that.

> Charge habits with batteries make a huge difference.

> Hot take: people should get used to, and expect to, replace device batteries 1 or 2 times during the device lifetime.

I agree that people should get used to replacing device batteries, but if you accept that then you should just stop worrying about charge habits. An MBP that doesn't have a defective or extreme-heat-damaged battery should stay above 80% battery capacity for at least 600 charge cycles without any special care at all. That's many years of regular charging, and 80% capacity is still good for all day usage.

Agree, and this is in fact how I treat my devices. I can easily do my own battery replacements on laptops, although I still approach phones with suspicion due to the water ingress problem.

My M3 Max can burn through battery much faster than my M1 Max ever could.

And some apps are really inefficient. New Codex app drains my battery. If you are using Codex I recommend minimizing it, since it’s the UI that uses most power.

A couple weeks ago I was working remote and didn't bring a power adapter, and I realized a couple hours in that my battery was getting kind of low. I clicked on the battery icon and got a list of what was using a lot of power: 1 was an hour long video chat using Google Meet, the other was Claude desktop (which I hadn't used at all that morning).

What in the world is an idle Claude Desktop doing that uses so much power?

They run a resource heavy VM for the claude cowork feature.

Electron?

I find Chrome to be the biggest culprit for battery life on my M2 MacBook Pro.

Which is fine, I use Firefox usually, but any time I open Chrome it just seems to drain the battery super fast.

Also check which apps use the energy.

I just bought this model in the past year for $600 and it still feels like a great bargain.

You can very easily replace the battery yourself for less than $100 USD too if it ever becomes enough of an issue that you feel you actually need to do something about it. My M1 Max is at about 88% battery health, but it still gets 4X-6X longer on battery (At full performance too boot) compared to my old PoS Razer laptop, so I likely won't be replacing my battery any time soon.

I bought almost brand new top case with battery twice by now for 50 USD on ebay. For M1 Air, but can't imagine Pro would be much more expensive, especially because keyboard is replaceable in Pro. Takes an hour to replace everything.

M1 pro MacBook pro here as well. Just today I was thinking I have no need to upgrade until M7 and by then maybe even MacBook Air would do. Especially since I will have my home server (dgx spark) available for anything serious anyway. So excited for the Mac studio configs though. M5 ultra 1TB would be a huge leap for serious home server builders.

I use an M1 for personal development an an M4 for work. I'm a typical dev. I don't feel any difference.

Same. It looks like battery replacement from ifixit is not too difficult, so I plan to do that when the time comes.

Incidentally, I just switched to Asahi Linux, but that was for software quality and openness reasons, rather than anything to do with performance.

How's Asahi treating you? If I upgrade from my m1max, I was going to try it out

I wish this sort of thing was encouraged in the modern capitalist technology space.

Unfortunately, number always must go up (and the rate at which the number goes up, also must go up).

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