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PCB for a custom power bank

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mikebravo

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Hello everybody,

For a project I need to build a custom 5000mAh power bank with 2 USB (1A) ports and a microusb, 4 leds to indicate the battery level. I will need to make a small batch of these (100-200 units), hopefully without wasting too much money on it.

I have these options:

- buying a batch of powerbanks, taking them apart, and putting the pcb+battery in my custom casing.
(which I want to avoid)

- buying the pcb that already has 2 usb ports, 1 charging port, and 4 leds, and the battery separately and putting them together in my custom case
(sounds good)

- creating a new pcb for it
(which I want to avoid)

- any other ideas are welcome :)

I'd like to keep the cost under 10$ for the circuit board and battery if possible (if impossible, as close to that as possible).

I saw some power bank pcb/ic boards online for 1$, but all from unreliable sources, do you have any idea where I can buy quality circuits of this kind? maybe without the usb ports soldered on so I can place them in my case where I want them to be and just solder a small cable from the usb ports to the board?

Same thing goes for the battery, do you have any good sources of batteries?

Thanks a lot!
 

- buying the pcb that already has 2 usb ports, 1 charging port, and 4 leds, and the battery separately and putting them together in my custom case

I think it is the best choice for you ,
I had a power bank with damaged charger-discharger circuit , I fixed that with a Li-ion battery charger and two DC_DC converter with USB out put , total price about 4$
designing and prototyping PCB for that is much interesting but need more time and budget
 

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