Skip Navigation

Zak

@ Zak @lemmy.world

Posts
7
Comments
872
Joined
3 yr. ago

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • Are you trying to charge a lithium primary? That seems... unwise.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • Lithium disposables beat alkaline in longevity, but lose in cost and are only 1.2V.

    They're about 1.6V open-circuit, and maintain 1.5V under light load for a large portion of their discharge cycle. They maintain 1.5V much longer than alkaline.

    They're terribly expensive for regular use compared to pretty much any other option though.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • You can’t just mix and match battery chemistry and call one superior.

    Superior is a value judgment I wasn't making there. You made a claim about cost and capacity between different chemistries (unless you meant something else by "rechargeable equivalents"), and I said it only holds up for cheap (alkaline) primaries under light loads.

    you absolutely have to be pedantic about it

    I'm trying to share additional information, not win an argument on a technical point.

    And you can’t just allow for different voltage ranges without all the electronics also being adjusted for that.

    That's true. The broader topic of long-term obsolescence ought to include device design though. Someone designing a device today that could potentially use AA batteries should think about whether they're obsolete for the use case.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • That does raise another issue: some of the retail-grade chargers are pretty terrible and may have led some people to a bad impression of how rechargeable batteries perform.

    A charger should charge cells individually, at a reasonably fast rate, and terminate correctly to prevent overcharging. Yours hits two points out of three: it's individual and correct, but slow.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • I had NiMH batteries in mind since we're talking about types that come in alkaline, and low-self-discharge NiMH batteries (e.g. white Eneloops) are generally fine to fully charge before storage.

    You might end up with a bit shorter runtimes storing charged batteries for years than charging them right before use, but it doesn't matter much when your runtimes are measured in years.

    There's one potential snag with certain low-power devices though: a few only work in the 1.3-1.5V range. That's terrible design since it doesn't use most of the power in an alkaline, but some of those won't work at all with NiMH.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • Wait until you hear about 21700s.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • As for rechargeable it’s twice the effort to find the charger every two years instead of just using the one time batteries.

    I recommend keeping some charged spares and the charger in the same place.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • I'd much rather see modern rechargeable batteries (Li-ion, maybe Na-ion in the future) in standardized, field-replaceable form factors.

    This is already common in flashlights. In my pocket today is a flashlight running on an AA-size 14500 Li-ion. There's a magnetic pad to recharge the battery with a proprietary cable, but I can also unscrew the tailcap and replace it with a spare, as most people expect from a flashlight. I can use AA in a pinch with reduced performance, though I'll note supporting both voltage ranges takes extra work on the manufacturer's part.

    Being complex and energy-intensive doesn't preclude batteries being standardized or field-replaceable. The issue with smartphones is that they have a highly optimized form factor.

  • Do you think standard batteries like A, AA, AAA, C, and D, 9V etc will eventually become obsolete?

    Jump

  • Primary cells are easy and cheap to manufacture, and hold much more charge than rechargeable equivalents.

    This is half-true at best. Consider these tests of an alkaline primary, lithium primary, and NiMH rechargeable AA battery.

    The alkaline has more energy than the NiMH at 0.1A load, but not above that. It will last longer in something like a TV remote or wall clock, but not in something like a flashlight with even moderate output or anything with a motor. Low-self-discharge NiMH, which has better shelf life beats alkaline once the load reaches 0.5A, which represents a device that will drain the battery in 4 hours of continuous use. Lithium primaries win the benchmark here until reaching a very heavy 3A load, but they cost as much as NiMH and only work once.

    Allow a different voltage range in the same form factor and lithium-ion rechargeable 14500 cells now equal or slightly exceed the 5Wh capacity of lithium primary AA.

  • Senate Committee to Challenge Auto-Safety Mandates That Hurt ‘Affordability’ | Republicans question value of automatic braking, rear-seat reminders

    Jump

  • Capping the luxury features and size of passenger vehicles would do a lot more to bring down costs than removing safety features.

    The average cost isn't the problem; the base cost is.

    There are good arguments for limiting vehicle size and weight for safety reasons, but that's a separate issue.

  • Removed

    Why is socialization so hard in the 2020s?

    Jump

  • She says on social media.

    I think it's important to draw a distinction between places people go to talk to each other and places people go for a quick fix of content just entertaining enough they don't need to do something harder.

    The former is healthy, at least in moderation. The latter is probably harmful for most people most of the time.

  • Hyundai car requires $2000, app & internet access to fix your brakes - what the actual f

    Jump

  • Correct, though the car in question here is electric and will almost certainly use the motors to slow the car to reuse that energy. The motors should be able to stop the car even if the hydraulic brakes fail, and probably more effectively than a mechanical parking brake.

  • Removed Deleted

    Permanently Deleted

    Jump

  • He’s clearly not an alien lizard like a Clinton.

    Trump was friends with the Clintons before he ran for president against Hillary Clinton.

    Trump also became friendly with Kim Jong Un after they met, having previously threatened him with nuclear war.

  • Hyundai car requires $2000, app & internet access to fix your brakes - what the actual f

    Jump

  • It is like paying to unlock satellite TV reception (even though we are receiving the signals the whole time).

    It's reasonable to charge for this because the value is in copyrighted content and a service that costs the provider money to operate. The same would apply for satellite radio in a car or an internet-based streaming service. It is not reasonable to charge for access to the adaptive suspension or seat warmers that are already in a car a customer bought. That breaks the traditional model of ownership.

    An interesting middle ground might be to allow the owner to install arbitrary software on the car, and charge for the OEM adaptive suspension app. I think I would like a world where things work like that; OEMs would whine about security to no end.

    I think it should be legal to attempt to decrypt satellite signals without paying; if the satellite service is designed well, it won't be possible. All the anticircumvention laws should be repealed.

  • Hyundai car requires $2000, app & internet access to fix your brakes - what the actual f

    Jump

  • It's an electronic parking brake. Those are common now because a small switch takes up less interior space than a lever for a cable-actuated parking brake, and the computer can disengage the parking brake if it detects that the driver is attempting to drive with it activated. The computer is involved in brake pad replacement to tell the parking brake motor to open to its widest position to accept new pads, and calibrate itself to their thickness.

    This requires a special adapter and software subscription rather than a button on the infotainment screen because Hyundai is engaging in rent-seeking and perhaps trying to direct business to its dealers.

  • How can you protect yourself from an abusive and violent sibling when you are financially dependent on your enabling parents?

    Jump

  • Beating animals to death is a crime most places, but calling the police about it would likely worsen OP's situation.

  • Android QuickShare is now compatible with AirDrop

    Jump

  • Can you? The blog post says it only works with Pixel 10 devices, which GrapheneOS doesn't support yet. There's no explanation for why it might need a specific model of phone.

  • Deleted

    Permanently Deleted

    Jump

  • A couple of them.

    One, I met when we were both five years old, and I knew then he would end up in prison. He helped beat someone to death when he was 19 and went to prison.

    Another I met when I was a child and he was an adult. I knew he wasn't quite right, but I had no idea how bad it was. As a teenager, I had an encounter with him that almost turned violent. He later raped both his daughters and went to prison.

  • What's the oldest website that's still alive that you've found?

    Jump

  • I notice the page does have Google Analytics, which is the only thing that did get blocked.