DIY Flashlight Power Bank

Awwww bugger, that is quite abit cheaper by $15, well nevermind. I’ve bought afew other things from them before anyway and had them fedex’d and they usually get here in less than 2 weeks, so i’m ok with the price.

@StyXSIS

can’t wait for your impression about this light :slight_smile:
depend on that maybe i’ll take one too

wow… the different is XML2 and XML U2 is $15 ?!? :stuck_out_tongue:

Nice. Comments on the page say that it’s back ordered though, so I guess I’m going to be waiting a while.

I think there must be better ways to charge your phone, and certainly better flashlights for $14. Seriously, if you want an emergency power source for your phone it’s easier to carry a USB cable and 1 watt PS than the light you linked. If the power goes out for any non-trivial length of time a single 18650 is not going to help your phone significantly given the horrible efficiency of one battery charging another. OTOH if you’re just looking for a cute little kit to put together, than have at it! :bigsmile:

By current I think you mean Voltage.

From your link - Output: 5.3V (1% Error), 800mA

@photon1k
i have 4 x18650 PS and that is too big for me to carry around :expressionless:

@fartybum
yeah sorry i just want to make sure about is that really 800mA or not,because i need at least 1A :slight_smile:

Yeah, I wouldn’t want to carry that either. That’s why I suggested a USB cable and a 1W wall wart, unless you spend a lot of time off the grid. But even then you could power the charger from your car.

working night shift sometimes i don’t have much time to charge my phone so i need a small but enough current power bank to charge my phone 2 or 3 times ,android phone really power hog even at minimum setting :stuck_out_tongue:

i cant find a way to choose different led on kaidomain. On the other site its clearly that you have options:

  • Cool White - XM-L2 U2 1C
  • Neutral White - XM-L2 T4 5B1 (80CRI Min.)
  • Neutral White - XM-L2 T6 3A ( +$1.99 )

is it available at kaidomain on 40$ with neutral white?

maybe if you order at least 100 pcs they will consider adding NW tint :bigsmile:

After serious consideration …i will pass :stuck_out_tongue:

I bought a couple of power banks in the past and both of them broke down.
If your selfphone has a micro usb input you can travel and have this (1…. 2….) as a charger. You will only need to charge the torch by night and use the wire to charge your phone during day from the flashlight. it is a good option actually

My android phone was the same way when I first got it. There are several apps on the play store to monitor and control battery use. I don’t recall which ones helped me - I had to experiment, but I did manage to reduce battery consumption by about 40%. I think it varys a bit between phones because of different versions of android and apps that you’re running.

Thanks for posting this, I have been looking for a modeable charger/flashlight for days…
Sadly the star makes almost no contact to the tube, I will order one and check what can be improved.

thanks werner
as you said the star isn’t making contact to the tube,maybe you can add a brass in there?

We will see how much room there is.
Another important point is the driver and his current and if it is improvable.
I guess it will take 3 weeks until it arrives.

I am not sure what you mean with the 1A thing?
My phone has a wall charger which is stated 1A but it charges only 0.8A max and like said above with rising battery% the current decreases…
But my phone don’t charge with full current on all setups, it only enables high current charging if the datalines are shorted which can be made easily on this DIY kit.

Important is the battery capacity:
2500mAh*0.8 efficiency/1.6Ahphonecapacity=1.25. So I will be able to recharge about 125% of my phone…

Anyone kinda concerned that the directions direct the buyer to solder wires to the battery ?

I see no problem in soldering wires to a battery…
Scaru reported once with a similiar one cell power bank from fasttech that the circuit shorted the battery and this caused heating the connection wire(he ripped it into pieces to prevent further problems), but KD gives even a hint to use better insulating material.

What I am wondering is if the battery comes with the kit, and if one is included if it is a Samsung like on the pictures, one picture shows a battery with a spot welded piece of metal on them…these questions will be all answered in some weeks…

And I am wondering what we see on this picture?

Today my kit came, look at the “battery” must be one of the new iron cells…?

Charges my phone with 0.45-0.8A depending on battery voltage, discharge protection at 2.5V. After the device goes in protection it can only be activated with plugging in a charging cable. Datalines have a 1.9kohm resistance. Maximum current from battery was 1.4A.
One short press enables the USB output(indicates by blue LED), long press enables the led light.
Led current less than 350mA so no heatsink necessary.
Cables are 22AWG.
All in all quite nice.

……………….
I have to test the 18650 charging circuit and make a picture to show the dimensions next to some other one 18650 lights.

Space for driver is available so I think I have to figure out how to mod it.
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Edit:
I got an answer from KD, there is no battery in the kit and they have no clue how the bearings came in the envelope…
I modded it with a xml2, used the original driver with a modification of the resistor to get around 1.5A through the led. Easy mod very nice host.