I’ve seen on SOME Powerbank, they have a built in lead, or at least a lead that is stored in the Powerbank.
Would this something you’d be interested in?
Powerbank idea
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Not particularly, more areas prone to failure and then having to still carry a cable you need if it does fail
I avoid such powerbanks. Cables fail all the time and if it’s built-in to the powerbank, then you can’t replace it if it does fail. Maybe something that’s stored with it, but not permanently built-in.
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Yes for the small emergency purse types 3000mAh with a flip-up port, in the 3 flavours of connector types. I’d immediately buy 3 of them for the non-geeks.
Not interested for larger as the cables fail too often to ruin an expensive product.
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That could work to hold a short 4" cable. Some kind of snap on or clip on storage.
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There is corner case when you’re talking the $10 type emergency backup powerbank in purse etc. The USB socket is huge, much bigger than the width of a cable so removing the USB socket for output is a space saver.
The cables are now getting similar expense to the smaller Powerbanks, they are both in the $5-$10 range. So if you wanted to remove one source of failure - the Powerbank’s USB output port - and replace with a soldered cable, you’d make reasonably compact and reliable backup.
I’ve seen a few that have like a 3"/4" double right angle
,
that looks like it’s stored in the side with the usb bits sitting top/bottom.
It could even be, that the usb A, sits in the slot (but NOT fixed) and the other end clips into the Powerbank
You could have a groove down one side and top/bottom, or both.
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I have one of these guys from years ago. Although they are convenient since the cables are there, I found them to be very inconvenient at times because the cables are too short. And another thing I didn’t like is the angle of the cable connector. I was not able to use it for my GoPro Hero4 Session because of it. And as others stated, power banks with cables included like this will only create another set of headaches if the cable should fail. Although I have one, I rarely if ever really use it. I just keep it in the car. Anker power banks for me, all the way. 
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As others have said, the built in cables create a failure point. I tested one of these out. I think my friend or a co worker had one. I found it annoying. Cables were to short and low quality. But the unit was expensive.
Actually the lead could be not compatible with your phone which then wasted the space that could be used for more capacity.
Hence 3 flavours.
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I think built in cables are yet another error source.
If these are broken you are quite lost.
For me : Different cables with different lengths.
There are so many different plugs nowadays it is nearly impossible to construct a power bank for all needs with built in cables.
It trades one failure for another. The USB port is one source of failure, if you replaced it with a soldered cable connected you’re improving the situation. Most cables fail at either end.
I also claim that the ultimate usefulness test is if is used and requires it to be such a simple product it works when required, the non-geeks do not think, they do not know what cable they need and just end up with a flat phone, so to gift them the one product with all they need would be useful.
I accept overall that cables fail often, so I am thinking lower end $10 3000mAh type powerbanks, not the higher end $20-$60 10000-26800 types.
I have never had a usb cable end or port fail, it’s always been the micro usb port end that has failed. So eliminating this connector for a more robust one would be beneficial.
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The biggest issue with most cheaply made electronics is moving parts that are built in. A non removable cable in todays age is usually just a scheme to force you to buy a whole new system when the cable breaks. I would rather spend more for cables that are replaceable than less for a unified system.
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My idea above is a compromise… Where the STANDARD USB end is not permanent, but rather is stored clipped in. Obvs if it’s the wrong lead, it doesn’t matter.
Now I have to say, in 10 years of cable accessories, I’ve never had the connector break or fail.
I have never had any cable fail since September 93 when I got my first phone, but also as a 48 yr old, I can’t say I’ve ever had a connector end.of a cable fail. The connection on the item, has failed (esp Nokia charge points) but not the cable.
I’m not talking about ones I’ve stood on etc.
The only reason I buy a new cable, is new fitting… Micro-usb now usb-c or the cat has chewed through it, but not cos the connector has failed.
Buy a meter.
Cables may appear functioning working but they are accumulating micro fractures in the metal and building up resistance. Over time this will eventually be a total failure but for years you’re basically getting a lot less energy out than put in as the cable heats up.
What Anker PowerIQ Voltage Boost does is deliver excess energy to overcome resistance so you are able to get the fastest possible charge despite an aging flawed cable. When using a wall charger you mostly do not care but in a battery it is wasting and aging the battery more.
This failure is proportional to cable length - more places for the cable to fail. Hence longer cables need to be manufactured to a higher standard particularly being made thicker so as it fractures there is still plenty good conductor remaining.
This is why I think a short cable in a low-end battery will be a good system.
If you invested in a cable and metered the output voltage and current will find your “good” cables are not, they will have slightly different efficiency and some will be really bad. I found about 1:4 of my cables were bad and discarded them.
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Here is a company offering g the sort of thing I was on about…
I also like the idea of having a choice of 2 cables, so you have what you want.
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Power banks are commonplace and with our increasing use of battery powered equipment: everything from mobile phones to battery powered headphones, portable speakers, MP3 players can be charged via a power bank official website
-I would like a powerbank with wireless charge built in and PD feature
-A powercore fusion with 2 ways to recharge, by PD and wall plug, then for output a real PD and QC 3.0 by battery and Carter mode
-powerpack: powercore 10000 redux + usb-c to usb-c powerline+ III + wall charger PD
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