DIY Flashlight Power Bank

Hi guys
anyone interested with this light

if i use 3.7v 3400 mAh battery i wonder how much current from the battery will i get when try to charge a cellphone since the cellphone need 5 volt to charge.
anyone knows?

Well, the product description says:“Output: 5.3V (1% Error), 800mA ”, so I guess 800mA it is.

darn it.
actually i need the one that can supply at least 1A :~
since my phone is really power hog

Not really, all the 1A is for is a completely flat batt charge. The 800mah will work if the batt still has charge, just turn the phone off for half hour to charge, that’s so the phones batt gets more of the input charge. It will charge a phone but it will struggle to fully charge if you leave a phone on to charge.

Are you interested in more flashlight or more power bank aspects; or more of a compact design?

There’s this thread with some more suggestions.

I kind of like the JinHeng - I don’t own one, but it’s on my wishlist.

Interesting to see a kit available.

@StyXSIS
thanks for the info :slight_smile:

@bgyen
i prefer this light
because side switch and tail cap

to bad the price is a little bit high though :stuck_out_tongue:

I’ve been looking around at quite afew so called “power bank” chargers since i read this thread and replied, and i have to say that this
3* 18650 batteries with 2* USBs to Charge different Mobile Devices with an XM-L2 emiter and Side-Switch
is the one i’ve bought after reading alot, simply because it can charge 1 singular, or 2, or 3 batts or all at once balance charge 3 of them. The left usb port can give out alternating amps to charge an iphone or ipad which need 1A and 2A to charge. And the fact it can do that probably means alot of other things can either be charged or even powered by this FL (Maybe?, I’ll have to test that theory out when i get it).

LOL, i was posting what i bought as you were replying.

:bigsmile:

KD sell cheaper than IOS
USB Flashlight
maybe we should start a group buy :wink:

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?