Power bank

How do you charge your phone on the go?

All I have is this small 2200mAh one, but I like it because it is really tiny.

Other urls found in this thread:

geekbuying.com/item/Original-XIAOMI-20000mAh-Power-Bank-2---White-375372.html
anker.com/products/variant/PowerCore-20100mAh/A1271012
global.mi.com/en/item/3160700004
budgetlightforum.com/node/51270),
youtube.com/watch?v=CwWIx-qU6mM)
twitter.com/AnonBabble

Lately I've been able to plug my phone into my car and get a good charge on my daily commutes (15 - 45 minutes)

I had a spare battery that I'd keep charged and swap with the original battery but the spare, despite being the same as the original, has started to fail

some 6600 mAh chink powercase I got from aliexpress for my s6. I modified my slim case so I could use the powercase and my slim case at the same time. the case charges the phone fully about 2.5 times

I just bring an extra battery.

>having to turn your phone off to get power

>have typical 3000mAh battery
>have a custom kernel
>use Lionheart CPU governor
>middle ground between interactive and performance
>clock up both big cores, which are mostly idle, to 2GHz on input
>DSP with hundreds of effects that require intense CPU work
>full brightness
>phoneposting all the time
>battery usage through the roof
>still lasts a day easily
what the fuck are you doing?

Xiaomi power bank. Not that much larger but not shit.

If I went with a single 18650 battery, I'd probably stick it in a Miller.

>what the fuck are you doing?
Too much Sup Forums and it eats my iPhone battery.

Pic related, one of multiple possible Millers.

All of this is obviously Chinese and only a few bucks.

Got my big boi 16000mAh chink (Xiaomi I think) battery. Charges my phone around 4 times.

I put my other battery in it.

>phone dies
>swap batteries
>boot
or
>phone dies
>plug into power bank
>tethered to it for hours
Not to mention my spare battery in its portable charger is smaller than any worthwhile power bank, and if it's for some reason important that I keep my phone on I can plug the spare battery into my phone and use it as a power bank.

>not using a EAS kernel
t. power consumptionlet

This is a good option, though not possible with most phones.

Plus it won't also cover your MILC and other devices.

> for hours
You can get from 0 to 80% in 40 minutes on quick charge phones that then will allow you to again watch porn for like 8h on that charge. It's not THAT bad.

My phone doesn't support quick charge and I'm not downgrading to one that does, so I guess it depends on your situation.

I've got a "PocketJuice" battery from Walmart (on sale for black friday) that holds 20,000mAh. This fucking battery is beastly. I could charge my iPhone 7 Plus and iPad Pro twice with this thing.

I also have a 12000mAh version. I'm pretty much set on battery power.

If I had friends, they'd always come to me like "Mark the Mint Man", but with batteries.

I changed it up. Now it drains power faster than the 1.8 amp charger can charge up.

Battery case

20k mAh Anker one that I got for £20 on sale a while ago. I've always got some kind of bag so size isn't an issue, and it's just about pocketable.

How much did you pay?

geekbuying.com/item/Original-XIAOMI-20000mAh-Power-Bank-2---White-375372.html

Someone posted the link to this (the other day in my solar charger thread) that I'm tempted to buy. Sale is almost over.

If you want a 20Ah bank, just get a Chinese one.

Teclast T200CE & Romoss Sense 6 20Ah are ~$20. Xiaomi 20Ah ~$26.

Quad ports on the Teclast, ~100g lower weight and more juice on individual ports on the Xiaomi (I'd get the Xiaomi, the 330.5g weight is just lower than on most banks and that tends to be comfortable.).

Don't sweat it, the price for this bank is pretty much always around $26-32 in some store.

That said, you can't really go wrong with that, unless the 10Ah one will do the job ("solar charger" sounds like it perhaps might be enough?)

One of these I'm going to use to charge it.

Hm. Yea, maybe the 20Ah model is better for that one. Better too much capacity than too little. Also because if you *don't* manage to fully recharge the bank on the go one or another day, it'll matter less.

>not keeping a second fully charged battery near
cuck.

Anything anker is pure quality.
Pic related is the anker powercore 20100 mAh

This is the most reliable battery I've ever used, and I've used a fuckload of portable batteries. It can put out 5V up to 4.8A which means your phone / tablet will draw power as fast as it can. It's a little big, but it's not exactly huge. It can fit in your pocket. This beast takes 8 hours to charge, but I'll get about 6-7 full charges out of it on my phone.

>Pic related is the anker powercore 20100 mAh

Do you mean Anker 20000mAh Portable Charger PowerCore 20100?

The model number is not the mAh.
But yeah I'm tempted just to get this. It is only $8 more dollars than the Xiamoi (show me).

It is in fact 20100 mAh.

anker.com/products/variant/PowerCore-20100mAh/A1271012

I found this flat, rectangular battery pack from Just Wireless that hold 6,000 mAh and has two USB ports. My favorite part about it though is the LED indicator that shows you it's exact charge percentage 0-100.

Okay, odd the Amazon listing shows 20,000 mAh.
In any case 100 mAh is meaningless. These devices have a true capacity about 70% of what the battery is rated at, so a 20,100 mAh power bank will get you actually 14,070 mAh discharged.

Sorry for the prior deleted post, got the Anker's weight from a poor sauce.

The current Anker 20Ah is almost exactly like a Xiaomi 20Ah, only a few grams heavier.

The kicker is that it's ~1/4 ish more expensive regardless, which you pay for basically no reason.

And solar panel guy: Amazon says it doesn't do pass-through charging.

Xiaomi's actually underspec'd, it has more than 20Ah exactly. And it's rated at 3.85V, not 3.7V.

>These devices have a true capacity about 70% of what the battery is rated
Nope. Ratings are accurate. Xiaomi even has the specs after conversion to 5.1V (again higher than 5V), it'll do at least 12.7Ah @ 5.1V at 1A.

You can find dozens of sources verifying this across the historical and current lineup of Xiaomi power banks .

All amp/hour specs are nominal lol. Batteries inherently waste energy to begin with through heat.

>Nope. Ratings are accurate. Xiaomi even has the
You have no clue what you are talking about and obviously haven't read any of the reviews of people discharging them to see how much they can get out of them.

I've been looking for a big one of these, like 30-50 Ah, that could also charge a big power-hungry laptop at least a couple of times, but they either cost £150+ or they're chinkshit that probably has like 20% of advertised capacity.

(cont'd)
In the interest of giving more details:

Xiaomi's power bank WILL do pass-through charging but it'll disable quick charging on both input & output while oyu do that.

Xiaomi generally rates charging and discharging efficiency - heat loss, too.

I have read many reviews and also verified them with trivial means (shitty USB power meter, probably not accurate to even 100mAh) on two banks.

It is just accurate. Maybe you found some or another idiot that observed the 3.85V (or 3.7V)( rating isn't the 5.1V one. There are multiple idiots like that on the internet too, yes.

>There are multiple idiots like that on the internet too, yes.
Do you mean like the product page that says the 20,000 mAh one gets you 12,700 of real output?

global.mi.com/en/item/3160700004

It has 20Ah internal (conservative "typical" estimate at nominal time of sale / production variance. Usually people observe a few hundred mAh more). That is *at 3.6V* internal voltage for this model.

It will convert / output them at >90% efficiency (which is really good) to a minimum of 12.7Ah *at 5.1V* & drawing the battery "empty" (to safe shutdown voltage...) at 1A.

Everything is correct. Xiaomi is just nice enough to provide numbers that other power bank manufacturers do not provide. Apparently because people like you don't get how their 20000mAh became 12.7Ah.

The 20,000 mAh is what the batteries inside are rated for. That is it. By there own numbers you can expect actually to get 12,700 out of the device at minimum before it is empty, meaning that over 36% is lost for various reasons, from converter efficiency (supposedly 93%) and to heat or the wire.

No, you bloody moron!

The internal battery's rating on this model *is at 3.6V*. This isn't Xiaomi's idea, it's what marketing always has done for power banks before Xiaomi even entered the market. Your Anker and no name shit also is rated at the battery's internal voltage.

The USB rating only Xiaomi and a few other provide is *at 5.1V*. Yes, you're not even seeing this one on most batteries, despite it obviously being a number of interest.

Anyhow, this 3.6V -> 5.1V conversion *is* >90% efficient when you pull 1A at 5.1V, and you'll get a minimum of 12.7Ah

>No, you bloody moron
You are trolling pretty bad and still have yet to address why their own website says expect 12,700 mAh out of a 20,000 mAh battery.

you could be Barry the Battery Buddy

not that user but use your fuckin brain

20,000 mah at 3.6v (lithium battery voltage)
12,700 mah at 5.1v (USB)

increase the voltage, drain the juice faster

>increase the voltage, drain the juice faster
mAh is a rating of the fuel in the battery, not the speed at which you empty the tank

Because that 12.7Ah rating is at *5.1V, 1A draw*. After the involved conversion, which is >90% effiicient.

As opposed to that, the battery's 20Ah rating which is just the typical internal lithium battery's capacity at *3.6V*. Typical spec like on all power banks.

the speed at which you empty the tank is the voltage

you have 20,000 mAh >at< 3.6 volts

if you step up the voltage, from 3.6 to 5.1, you will drain the capacity faster

therefore the battery is only rated for 12,700mah at 5.1v

And just to make this bloody explicit: Even if the conversion between voltages WASN'T lossy (which it is here, but at a pretty low percentage as far as power banks go), you'd not be able to convert 20Ah at 3.6V to 20Ah at 5.1V without violating conservation of energy.

>you will drain the capacity faster
Irrelevant, if the battery gets you 10,000 mAh then you can drain that in one second or one hour, it is still 10,000 mAh.

>violating conservation of energy.
I didn't realize the trolling went to physics...lol

just bought Xaomi 20k
will i regert everything

As long as you expect to actually be able to only get about 12,700 mAh out if it then you will be fine!

ok you can fuck off back to reddi't now

enjoy your 2000mah AA batteries at a million volts

>iPhone

PS: As an olive branch of sorts, you're not the only one to not get very basic electrical units.

Ergo all the dicking around with internal capacities at 3.6V in marketing these power banks, despite few ever making particularly direct use of that.
And ergo why Xiaomi with its (apparently better educated?) audience is one of the few that uh, dares "confuse" customers with a 5.1V USB related rating.

Dude, the "h" in Ah is for "hour". If you do Ampere seconds, the number is different by a factor of 3600.

so is everyone giving their 20k mah rating based on 3 volts instead of 5, or just xiaomi

Sorry user but this battery isn't rated at a million volts, but all I said was true. If you suck down more volts, than you will drain the battery quicker, but the capacity won't change.

ignore that faggot he's intentionally ignoring the voltage to be le ebin master troll

Probably not. It's a really good device and [obviously] trivial to operate.

>Dude, the "h" in Ah is for "hour". If you do Ampere seconds, the number is different by a factor of 3600.

You can convert it to anything you like user. Flash uses the attosecond if you want to try that. But it still doesn't change the battery capacity.

Thanks for trying to help anyhow, I guess you're right.

Plus I don't think I could explain the issue in any more detail anyhow..

i could consume all of that in about 20 minutes

>can someone verify this thanks
This is basic battery stuff user. You can gladly watch some battery basics on youtube and they will tell you, but yeah mAh is a standard battery capacity measurement and has no effect on the speed at which you drain it. Though of course fast drainage creates more heat which wastes even more of the battery.

Looking for a powerbank that can be charged AND deliver power at the same time.
To protect a RPI and a camera from a powerfailure.

That's commonly called "pass-through charging", and various Xiaomi models (but not all you could find!) have it.

Any models in particular ?
We've already bought two that were supposed to be passtru but nope.

PS: I'll also point out that the Xiaomi power banks have protection circuitry.

On one bank where I actually briefly tested this, applying much higher voltage than expected on USB (I think it was around 7V on the input or so, not that it was really noticeable on the output at that point) led to a shutdown.

Which is good for safety, but obviously wouldn't meet your goal in case you want it to smooth over voltage spikes.

Not going to link everyone, and I know it's bait, but I'm hungry and bored.

The confusion here is coming from the difference between mA, and mAh. The h here is key.

You're basically comparing miles, to miles per hour. Very very different.
Milliamps (mA) is a quantity. It's a concrete fact that doesn't change due to speed or time. If you draw a 4,000mA battery dry, it's the same amount drawn no matter how fast or slow you do it.

Milliamp hours (mAh) contains a time vector. It doesn't actually tell you the concrete capacity as a fact, but as a function of time. It's how long it will last based on the draw rate. If you have 4,000 mAh, you can draw 4,000mA for an hour, or you can draw 8,000 mA for a half hour. But the total capacity is the same either way.

Going back to the miles analogy, mA would be saying "This track is 5 miles long". mAh would be like saying "This track is 20 minutes long at a speed of 25mph".

Current 20Ah model, 10Ah model (budgetlightforum.com/node/51270), and one of the 10.4Ah models (youtube.com/watch?v=CwWIx-qU6mM) at least.

Ok gonna take one to test, thanks !

Battery Backup Barry. Sounds good, ship it!

Just to quickly show you, 10Ah PLM02Z charging while dimmable LED stick is glowing. (Hmm technically the second newest 10Ah model? IIRC they had a newer type-c port one now).

>confusion here is coming
The only confusion is from trolls who seem to think mAh is a variable based on discharge rates independent of heat.

>20Ah
Can anyone here beat my 48V 20Ah 38120 LiFePO4 Battery?

Stock photo because it has been in my closet for five years after I lost a job and didn't want to continue the electric bicycle project.

Well, I don't own one, but this manufacturer makes big batteries.

Its obviously just getting heavier and heavier. (Your battery maybe is 1kg or more? This is 160kg.)

Or with a different voltage, 1000Ah. Anyhow, its not really viable for the use case discussed prior.

Mine is 11kg. It was $700 five years ago. About $600 now.

Definitely a bit pricier.

Not even sure this is a good offer, but I can see a 3.2V / 300Ah Winston is around $380 in one online store. (Arguably plus shipping, and also in that store, they're now apparently quite often sold out. The off-grid people caught wind of these, plus there are of course a good number of all-in-one lithium solar battery management boxes now).

Oh man those people on YouTube building off grid power with 18650 cells are just so awesome. I wasn't aware they got that cheap. Can't wait until the tesla 2170 cells become available.