>>47175923 Nothing would ever be available to the consumer market.
Making one wouldn't be to hard though. Well it would be time consuming, and require technical knowledge and software design.
Also no matter what you do, the pop up will display asking if the user trusts this device on iPhones and on Android it would display a notification that data transmission was active, which doesn't appear when you just plug your phone in to charge.
This would still get the majority of users, but who is going to ask a stranger to use their power bank?
I've thought about this before. A device I could stick in my purse that I can connect SD and USB drive to, that also has a power bank attached to it if the battery get slow, but otherwise broadcasts a low range wifi signal for my phone to connect to for additional storage options. Always thought the idea was really cool.
>>47176006 Yes. At least my gf thinks so, any ways
>>47175985 Yeah ok but why would you wanna creep on your friends like that? Seems weird, I mean I guess I should check where I am, but still, damn.
>>47176001 I work in a photolab, where we have kiosks users can plug their phones into. I'd say the majority of people just blindly hit trust, but it's hard to tell. I've only had I think one person ever ask me if it was a legitimate question, to which I responded of course "yes that's apple security software, lol. Our Kiosk is probably not going to haxxor you though." She laughed. I sighed.
>>47176612 Yeah I ain't going to that board. I just googled it and found this nifty little converter. http://www.ebay.com/itm/DC-DC-Converter-Module-12V-To-5V-Duble-USB-Output-Power-Adapter-3A-15W-/321645899181
Have an Anker. Part because I did the Amazon prime trial during the Christmas season and was pretty much just buying stuff for the free shipping. Looking back, I kind of wish I bought the HooToo Tripmate Elite instead. I bought the nano during my shopping spree and usually plug it into the Anker. The Elite would've made things more convenient.
>>47177228 That's weird as fuck. Fucking handheld consoles.
I can't wait for nintendo to ditch their hand held consoles altogether and start publishing exclusively on mobile markets. Or do both at the same time, modern phones have at least as much power as this last generation of DS consoles.
>>47177810 (cont'd) Also interesting: One of many teardowns: http://www.gizmochina.com/2014/11/11/xiaomi-power-bank-16000-tear-down/
>>47177826 I bought them from various sources (quite a few relatives wanted one, too).
Merimobiles, antelife, ibuygou, geekbuying & aliexpress were where I bought them from, though there are many more shops... prices fluctuated and I kinda just found the cheapest price as a little pasttime.
The aliexpress one was unfortunately a fake, but that's of course just one store there...
>>47177907 (cont'd) Also, as an additional remark, charging efficiency & heat production & the current various banks can accept/deliver is really quite different.
I've had some very cheap banks which had like 60% charging/discharging efficiency, and it seemed to me like there also was a lot of loss on discharging, though I didn't remove the batteries to verify that hypothesis (would have known if I had charged the batteries separately, perhaps).
Most were like 70-80%.
The Xiaomis charge/discharge at like ~91% efficiency, which is really nice.
(Since I haven't bought any high-end packs after the Xiaomis, I don't know if others do that too... but anything I had bought at +- that price until then -which were four packs- doesn't.)
I got one from argos a couple years back for when I went camping, got 2.5 charges out of it on my HTC one x, don't use it anymore, stopped smoking weed and now I don't have any friends, just the warm glow of my monitor to keep me company. Hold me /g/.
>>47178595 > /g/: how do these work? Do you just plug the unit into the wall to charge up, and hook everything else up (phone etc) by USB? Most of these both charge AND discharge by USB.
You could plug them into your computer (by means of an USB cable) to charge, though it's more common to use a household power socket -> USB power adapter... even more so if you want to charge the power bank at more than 500mA - most computers won't do that.
Usually household -> USB power adapters are an accessory, otherwise they're available cheaply online ($1 for crappy ones, ~$5-10 for really rather good ones).
> How long's the lifecycle on these things, and am I going to get good use from something wallet-sized Most as long as the 18650 batteries inside, though some charge shitty and will reduce cycles a bit.
Let's just say like 1000 charges / discharges, though capacity will have gone below 80% of new at some point before that.
>>47178995 Hm, it's a tough call. First of all you have worse storage over life by battery (which almost makes up for the like 2x the cost).
Then you have extra losses at charging / discharging.
Then there are the disadvantages how rapidly you can charge / discharge. Maybe that means you need more batteries than you'd like for the capacity.
Then there is the problem with keeping the batteries inside so they can remain warm, flooded wet cells release too much gas to be safe. Sure, there are gelled electrolyte batteries, but these also cost more and narrow the voltage ranges at which it can be charged more...
It will depend on a lot of factors, but I'm just not at all sure it's always working out to be cheaper to use lead-acids,
>>47179102 I'm mocking the fact that you're using 1/1000th of an amp hour to measure several amp hours. The milliamp hour is a subset of the amp-hour, not the other way around. Using mAh to measure capacities over 1 Ah is beyond stupid, especially since the precision of a battery absolutely doesn't warrant such precise denomination.
>>47177880 >3200 mah cells That's cool, I already thought there had to be something better than the 2200/2600 you see everywhere. Those prices are awesome too. Are 'rectangle'/flat lithium batteries more expensive to make? Or just harder to keep cool and to keep from bending and puncturing compared to strong cilinders?
>>47178338 > Those prices are awesome too. Yea. And that's the reseller prices including export shipping fees and their cut.
The original price was cheaper... but ah well, we can't get that in Europe or the USA right now.
Maybe if they start selling here officially, but for now, it's a good price comparatively speaking. Xiaomi's product quality is really neat anyways...
> Are 'rectangle'/flat lithium batteries more expensive to make? I'm not sure, but 18650's were cheapest to buy in retail for a while now... maybe there's a reason behind this. Might be economy of scale, might be manufacturing complications... not sure.
>>47179641 >wont shit themselves in adverse thermal conditions. Do such batteries even exist. Fuck I bet their expensive.
It would probably be easier for you to jurry rig a timer switch that just disables power to to the unit after a certain time period.
Or just get a smaller power bank that can simultaneously charge and recharge at the same time. So when you turn your car off, it'll power your device till it dies, then when you turn your car back on, the power bank begins to charge, and then begins to power your device once more.
>>47179710 Pic is aliexpress, I guess both ebay and aliexpress sellers do want to keep their ratings above 99.9% positive or something, so bitching about receiving a fake is probably going to work. >>47179723 >wearing anything bigger than a terrorist watch >handcuffing yourself to your device >wrapping housefire batteries in a thin plastic enclosure around a weak part of your body that also happens to be able to smack against walls and doors a lot
And it doesn't charge my vita, and less than half my phone, for 25 burgers excluding shipping. That money could buy you 10(!!) times the capacity, plus the ability to charge 3dpd grils' iPhones while charging your own phone too.
>>47179696 I was contemplating just getting a smaller one, but the problem is that most of the ones that are actually any good are 12k+ mWH. My cameras draw like 1.6 watts each at most. A 10k mWH literally would power both of them for more than 5 hours (the power usage is much lower when stationary, my guess is because the video encoding is a lot simpler)
As far as durable batteries, lead acid ones seem to work just fine for 5+ years in a car. A pitty I couldn't find anything like what I'm looking for that wasn't a several hundred watt system. I might just setup a direct draw system on the battery since my fuse box has several open slots, and configuring something that way is just a voltage limiter, and a microcontroller that checks the ignition, and whether the voltage on the battery is dangerously low (part of the appeal of the seperate pack is that it ONLY drains the battery when the car is running, so I'm guaranteed power for starting in the dead of winter)
I just don't want the battery to die after 6 months of hot cold cycling when I'm rolling around town in the midwest. Temperatures here can go from -40f in the winter to well over 100f in the summer if it's parked in the sun.
>>47179748 I'm talking about discharging. Engine cuts off. Power to the battery pack stops, it provides power for like 3 hours, then shuts off, regardless of how much power it has remaining. If the pack is not charged enough to run for 3 hours, it just shuts off whenever.
It's dash cams with capacitors. They cannot be overcharged. When the power feed goes out, the camera safely shuts down in about 5 seconds, writing whatever segment it was on to disc. The capacitors take notably less than 30 seconds to fully charge once they get power, and the camera starts up as soon as it gets power.
>>47175986 that would be the tits for photojournalists/reporters
>>47176719 not that dude, but /diy/ acts like supar sekrut club assholes if you ever think about asking questions about anything, ever. like if you ask whats a good adhesive to bond 3M scotlite fabric to cordura that wont crack, they start babby dont know hurr durr. they are as bad as /out/
>>47177036 col mustard, in the parlour, with a wrench
>>47179981 >Pic is aliexpress, I guess both ebay and aliexpress sellers do want to keep their ratings above 99.9% positive or something, so bitching about receiving a fake is probably going to work. Not only that, eBay and aliexpress both will typically refund to the buyer's favour at the most minimal proof provided (some picture or whatever), but on Aliexpress you can't do that after you confirmed receipt, so have a close look first.
Which you should. Xiaomi fakes are usually superficially looking very comparable (especially when you don't expose the internals). Which is also why there aren't too few aliexpress sellers that try selling Xiaomi fakes anyways.
Anyone know any good replacements for the stock battery that comes with the S4, or basically any 2600 mah battery? Also the techmatte 12,000 powerbank is pretty decent. Customer support is pretty good as well, their cable that came with the thing shit itself and they're nice enough to send a replacement.
>>47175109 I use a battery case for my phone, 3800mAh case because my phone dies at 40% and a new battery costs more. It charges at 0.5A so the battery drains when the screen is still on but does the job.
>>47180026 > Power to the battery pack stops, it provides power for like 3 hours, then shuts off, regardless of how much power it has remaining. Hm. I think you might have to DIY that externally. At least I personally never saw a battery pack that would do this.
I'm certain that someone will eventually stick a programmable computer and half a smartphone into some battery pack, but it hasn't happened yet...
I put together my own. You can buy the case and electronic board for around $10 then all you need is 4 18650 batteries. I settled for some Panasonic 3400mah batteries. It's got all kinds of safety features and the charge controller is pretty good too. I think it cost me around $50.
>>47180372 Do the math nigger. 3400mah*4 batteries.
>>47180387 That's a nice one. Arent those xiamos sealed? I don't like the idea of having a sealed battery pack that you can't know for sure the quality of the cells and you can replace them. It was actually $42. The 4 Panasonic batteries were $32 and the case was $10
Hey /g/ I wanted to ask and this thread seems appropriate. I was looking for a portable battery, pretty much for once a day use because I work 15 hour night shifts and my phone always needs a top up because I use it to listen to music and whatnot during pretty much the whole shift.
Pretty much the smaller and more portable the better,and along as I can get one full charge on my Nexus 5, which only has a 2300 Milliamp battery Im good. So anything like a small 2500mAh or up would be fine. Looking at either the Anker Astro Mini or the PNY PowerPack Digital 2600 at the moment. What do I get, or am I missing one thats even smaller or more convenient?
>>47180423 > Arent those xiamos sealed? Yes, they are.
> I don't like the idea of having a sealed battery pack that you can't know for sure the quality of the cells and you can replace them. Well, the earlier is kinda guaranteed by Xiaomi's quality control and the suppliers being LG (I think also had Panasonics).
But the latter is true. Now the question is if that makes it worth to pay $50 rather than ~$25-30 (for the common price for the 4 16000 one - not sure if the one anon found before on aliexpress for $22 is genuine yet).
The Xiaomi bank barely costs you more than the batteries inside are in online retail - at least the places I saw.
>>47176592 But a dc to dc converter faggot. Just go on eBay and look for one that accepts an input voltage of 5v to 40v and that has a variable output voltage. The current will be constant of 1 or 2 amps.
>>47180452 Show me a cheaper option that uses equal or higher quality cells and has the option to replace them after they can't maintain a charge anymore.
>>47180433 Depends... http://www.gpbatteries.com/INT/index.php?option=com_k2&view=item&id=173&Itemid=527 This looks pretty nice if you want something that doesn't look like a dick in your pocket, but you are probably going to pay a bit more for the thinness. You can shop around on aliexpress or something , but there is nothing 'perfect'. Just compare online forever, or overpay for something nice, don't overpay for a 2200/2600 mah battery though, they are generally slow and too expensive for what they offer (if you're not buying in china)
>>47180578 I wonder what size batteries that one uses. The 3400mah 18650 from Panasonic are the best in that form factor at this moment. I saw a picture online and it looks like it's using 4 batteries but no one makes a 18650 that has a capacity larger than 3400mah. Maybe they are using a larger size battery. Because I can't see how they can claim 16000mah with what looks to me 4 18650 batteries.
>>47180679 They can last quite a while, but you shouldn't store a battery at 100% for a long period of time, it makes them degrade faster. That's why new phones etc are always 30-50% full. Not because they discharged from 100%, but because they are going to stay in a box for a month, but maybe even more than a year, so they only charge them to half their capacity or so.
Yes, a cheero Energy Plus because it's 12,000 mAh for only like 25 bucks and it's small enough (barely) to comfortably carry in your back pocket. It has 2 usb ports for charging devices and little indicator LEDs to show how charged it is. It also has a flashlight that I have never used, but hey, it's there. Highly recommended.
>>47175986 I got it cause in my job I need to share data with coworkers so having a central personal cloud device works wonders. Also I'm in hotels a lot, so making my own WiFi from an Ethernet plug instead of the crap WiFi (or extended good WiFi) works amazing.
My GS4 mini has a 1900 mAh battery, and I found it frequently dropping to ~30%, dying every once in a while with only a days use. I picked up a cheapo $5 power bank at Target. It's only 2000 mAh, but it charges my phone very quickly, which I like.
You won't go to jail, but if they catch you, they will have ample reason to fine you heavily. The guy in the article used it while driving to cut down on the amount of retarded drivers on the phone on the road on his morning and evening commutes, but the justice department will see it as an obstruction preventing people whom need to use the phone during emergency cases, such as during a car accident or something.
Also, the loss on charging lithium batteries and the speed at which you can charge / discharge them is different, but I guess that wouldn't matter quite as much when you have 8 slots and only want 5V/2.1A out of it...
>Why aren't there aa to battery bank converter with 8 slots? I thought there are.
>>47187243 (cont'd) There are some reasons why you might use the NiMhs anyways, resistance to cold temperatures or smaller capacity storage (I don't think lithium rechargeables can be downsized well to AA or AAA size...).
In the usual case you probably don't want a battery pack for smartphones and tablets and the like to be made with NiMh though. It's just more power, cost and space-efficient to do with lithium rechargeables.
Why is phone technology so good these days. My phone has 3000mah while my laptop only has a tiny bit more at 3200mah, it's so fucking bullshit. It's just crazy seeing these power banks with more than 10000mah.
>>47187382 I'm really doubtful that any of the batteries in this thread actually holds anywhere near what they're advertised to be. Chinese companies are dodgy as fuck when it comes to battery capacity, like the giant 10Ah Zerolemon battery for the Note 3 that only holds around 6700mAh at best.
Thread replies: 181 Thread images: 32
Thread DB ID: 48577
All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.
This is a 4chan archive - all of the content originated from them. If you need IP information for a Poster - you need to contact them. This website shows only archived content.
If a post contains personal/copyrighted/illegal content you can contact me at firstname.lastname@example.org with that post and thread number and it will be removed as soon as possible.