what style of rechargeable batteries does anon prefer
>>108192236Imagine the housefires.
one that can charge a laptop.
>>108192236Style? quite fond of 18650's... But you use what you need...Brand? LiitoKala seem to have decent chemistry. No-one hear more of that donut labs battery?
Still have my decade+ batteries I started using with xbox 360 controllers
if you were to pick the form factor and specifications of the "new" off the shelf, rechargeable batteries that are to be used in ALL electronics from here on (laptops, phones, handheld consoles, music players, cameras, drones, everything) what would you design?
>>108192406For AA chemistry in NiMH, you'll be hard pressed to achieve better than Eneloop Pro..To assume the 360 was anywhere new when you started on them batteries they'll be throughly shagged... How much current does they hold?You can charge up an eneloop, throw it in the drawer, and be confident that'll still have charge when you pull it out in three years time. Can you say the same for them?
>>108192430Sill use them in mice and remotes, they last months per charge
>>108192427>what would you design?With those specifications, it'd need to be a pouch.You cram 18650's into a phone, phones are gonna have to be at least 18mm thick. And that's assuming you can get the electronics, screen, and case in at under 0mm. Don't see that gettin' popular.Designing one battery for all things is very retarded. Different things have different energy requirements. The battery that drives a bus should be a different size and shape as a battery that drives a vape...
>>108192435>Sill use them in mice and remotes, they last months per chargeI get about 18month in keyb and about 12 in moose... If that helps you scale it.
>>108192456I don't know why I would care about that, also keyboards usually use AAA not AA
>>108192236ikea rechargeable batteries. apparently they're literally the same as eneloop.
>>108192452I would like my phone to be thicker, actually. Maybe give it some semblance of ergonomics instead of this nonsense edgeless thin-as-a-pencil horrible-to-hold trend we've had for 2 decades now.Give me a phone that's a whole inch thick.
Just got pic related
i also have a couple boxes of alkalines for the salt and pepper grinder. kinda regret not getting usb rechargeable grinders, but eh.
>>108192236Non- flammable
>buying non-jap eneloops
>>108192236I don't own anything that uses normal AA or AAA batteries anymore except remote controllers for my tv and shit. Everything has rechargeable batteries today, even the cheapest budget crap.
>>108192236Regular ones that go in a charger, not ones I have to plug in individually and that waste a third of their volume on a USB port and charger circuit. 18650 are good too but not many things take them.
>>108192236I have maybe two things that use regular batteries anymore and I just steal a couple from work when I need to replace them. Everything else I have either has an 18650 or built-in rechargeable.
>>108192406I've had 4 of these bad boys for... 18 years or something like thatStill going strong. I keep telling myself I should buy more.
>>108192540I got the same thing but with different name for $50 few months back during black friday. These are all chinese name with different brand.
>>108192953>Everything has rechargeable batteries today, even the cheapest budget crap.Planned obsolescence.
>>108193856>victory cells
>>108192236cheapest
>>108192372>laptopthey have round charging port
>>108192452>At least 18mm thickUNGH THICKER!This stupid thinshit trend started because manufacturers wanted to sell you something super gimped that would have gains notable enough for you to need a new one in a year, rather than having something that could easily be used for 20 years or longer.>And that's assuming you can get the electronics, screen, and case in at under 0mmThe battery doesn't take up the whole breadth and width of the case.
>>108192236eneloop
picrel paired with my 20v/15ah batterypretty sure it's impossible to buy anything more dense which is pretty cool
>>108193916Not in the last five years
>charging controller and usb-c circuitry in every celldisposable-vape-tier of e-waste
>>108192236Left is better.Right has a bit sticking out the side that may make it not fit in some devices.
>>108195058it's going to need active circuitry in every cell anyways. there's no other way to drop 4.2v down to 1.5v. the problem is 'the industry' and how engineer retards only choose between 1.5v AAA/AA form factor and non user serviceable lithium pouch form factor. button top lithium cells and its various form factors need to be more common.
Ban user-replaceable batteries. Problem solved.
>>108194312>The battery doesn't take up the whole breadth and width of the case.True.But "18650" is a measurement. 18mm thick. 65mm long. the 0 denotes the cylindrical format.So. The unit will be 18mm thick. Assuming you can get the case, screen, and electronics in at under 0mm.Unless ofc you want to mount the 18650 'sideways' then you'll end up with a unit 65mm thick, assuming you can get the case, electronics, and screen done in 0mm.>>108192953>Everything has rechargeable batteries today,And how easy are they to replace when they inevitably fail?One they start puttin' solid state batteries in things this'll become less of an issue...>>108193736>18 years or something like thatlol.How much current can they hold? For how long?Prolly pure dendrite internally...>>108193916>they have round charging portBy which you mean 'barrel jack'?Typically, the laptop end of most power bricks output in compatible properties to USB-PD. In theory, it should be possible to build an adapter should one not already exist... >>108194761You know that's just 18650's in there, right?About now the best you're gettin' appears to be liitkala, 15Ah that's what, 4 batteries? Each one o the 18650's I just got *actually hold* >4Ah so 4x o them will deliver >16Ah...
>>108195202>button top lithium cells and its various form factors need to be more common.14450?Tho, DESU, I always thought puttin' 3.7v Li-Ion in the same format as AA 1.5v t'be f'kin stupid. Only a matter o time before someone gives suttin expecting 3V 6V+...
>>108192236I'm thinking of getting some of those 1.5v li ion rechargeables, should be great for anything with a motor.
>>108195288>14450that would work but it's probably smarter to just commit to a single cell 18650 considering most AA/AAA devices are using a minimum of 2 cells. a single 18650 is 8-10 watt hours of energy and two high capacity NiMH cells are like 5 watt hours total.if the engineers weren't retards they would adapt the circuit to run off a 3.7v nominal / 4.2v max voltage. but even if they were still retarded, you would likely come out ahead with 18650 even accounting for buck converter efficiency losses.
>>108195366>single cell 18650As my first post suggests, my favoured format...But this is restrictive in terms of device footprint... Not everything wants or needs to be 18mm or 65mm thick... >a single 18650 is 8-10 watt hours of energyIf you get a recycled dead laptop battery, or substandard chemistry, maybe. Just threw a liitkala inna nitcore charger, 75% ish. 4.11V 3553A. I make that 14W right there, and it can eat moar charge...>they would adapt the circuit to run off a 3.7v nominal It's all about what is eatin' ... You're building a weather sensor and there's not a pressure sensor on the market that eats less than 3.7V you'll be doin' that... Until you start hittin' motors etc most things in a circuit actually want less than 3V... Most circuits are already droppin' power for the components...
>>108192469Yeah same, these are goated
>>108195276> dendriteLol do you want me to measure the voltage and do a discharge test later?
>>108196183Actually. Yeah.I'm quite curious as to how much charge they can hold/deliver two decade in...
>>108195276>You know that's just 18650's in there, right?Maybe! But it's not like I bought the battery to use as a powerbank. It's just a neat little side effect that comes with having a gorillion dewalt tools.
>>108192236I don't look too much into batteries, i've only gotten picrel
>>108192236you need to be actually retarded to find these designs good
>>108199057Also I forgot to mention: this is 15ah at 20v. aka 300wh. The nominal voltage of an 18650 is 3.7v so your math is off without accounting for that.
>>108195058that's funny cause i got my usb rechargeable batteries in like 2011 and i still use them to this day. meanwhile you've probably lost your proprietary charging box thing
>>108192236I don't know the technical reason, but everything in my gut is screaming "bad design" with these. I have a fancy dedicated charger that revives dead cells, can charge each battery individually at different rates, etc. There's simply no way these cheap direct cables are doing all that.
>>108199455Electronics are in the batteries
>>108199402Rephrase that in proper English, please.
>>108194761Best battery charger. Blows me away nobody else could figure this out.>>108195276>You know that's just 18650's in there, right?They make ones with tabless cells and LiPo too.
>>108195346Not really because the buck converter has higher internal resistance than rawdogging NiMH or dry lithium.
>>108199107They call it 20V MAX because the peak charging voltage is 20V, but they settle to 18V like every other brand.
>>108201146Nimh voltage is too low for my application. Plus the quiescent current should be negligible compared to the current the device draws.
>>108201146Buck converters don't have an internal resistance, they might have current limiting for safety which will be way higher than any commercial device would use.>>108195346These "1.5V" lithium ions are perfect for that. My lint remover runs at full speed for the whole charge using them.
>>108192540Only 99Wh? I got a 250Wh recently for like $180.
>>108192540>>108201778288Wh for $110 and it has an inverter.
>>108196307I have 2 batteries available. Let them charge a couple hours. The charger light never turned green. One measures 1.51 V the other 1.39 V. Both 2000 mAh capacity. I took the 1.51 V battery and connected it to a load and drained 400 mAh. Measured the voltage and it's at 1.29 V. Maybe I'll drain it more tomorrow. I need a better way to drain it.
>>108192236i’ve had good luck with the ebl brand on amazon. they keep my kids toys going
>>108192236Thats so silly
