Introduction: Mentos PowerBank

this is my first time doing an instructable so go easy on me

Step 1: Stuff You Need

18650 3.7v 2200mah (from old laptop battery)
1A lithium charging module ($1.39 dx.com)
0.9v - 5v step up boost module ($1.99 dx.com)
slide switch ( from a broken toy)
Mentos chewing gum container

Step 2: Wiring

solder wires into module and battery + to + and - to - dont put it on backwards unless you want your modules to get toasted

Step 3: Stuffing Everything Inside

this is the hardest part for me since the container is too small. but you can figure it out.

Step 4: Done!

dont expect this to full charge your phone. when charging the powerbank red led means charging and green for full

Comments

author
Ganesh sivakumar (author)2017-01-22

is this mentos power bank rechargeable

author
kubik256 made it! (author)2016-03-05

Nice instructable ;) I made one with old Nokia phone battery :)

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author

could you tell me the circuit digram for that

author
dishup (author)kubik2562016-04-08

which mobile phones battery

author
kubik256 (author)dishup2016-04-12

I've used BL-4U with 1000 mAh, but I think, that you can use every old mobile phone battery with 3.7 V except Ni-Mh of course :)

author
Ganesh sivakumar (author)2017-01-22

instead of a 2200mah battery can I use 9v battery

author
DaytonaPete (author)2016-02-13

Very nice and simple. I'm building one!

author
dmahato (author)2015-09-02

Hey, what about battery discharge protection ????

author
betmac (author)dmahato2015-09-25

www.dx.com/p/tp4056-4-2w-1-2a-5v-lithium-battery-charging-discharging-protection-module-w-micro-usb-blue-397213#.VgXcBTOwrqA

author
kartik negandhi (author)2015-05-10

can I connect 4 18650s in parallel to extend the mAh of the bank? or if not 4 den at least 2?

author

yes in theory, but in practise you need to isolate the cells from each other

author
OrlandoSailor (author)neopolitan2015-05-11

Please explain what you mean by "isolate the cells from each other". I would like to use the same parallel design suggested above. Thx!

author

Basically, you would use a diode on each battery to prevent it from back-charging the other batteries.
Make sure you install them in the correct orientation because it only allows the charge to flow in 1 direction

author
utkarsh.sharma.37201 (author)2015-05-19

thanks alot

author
siim.kuningas (author)2015-05-18

just in case: cheap ebay batteries are not protected

author
MagnusK (author)2015-05-12

Hey, do you know what gauge wire you used?

author
betmac (author)MagnusK2015-05-13

im not sure. i just scavenge those wires from a broken fan.

author
Essahihi Mostafa (author)2015-05-11

nice

author
JasonM11 (author)2015-05-11

if you want longer batt life you can get wafer type RC 1 cell lithium's from hobby king for a very cheap price, great build by the way.... Lastly everything in life is dangerous however, this isn't going to be risky the current coming out of the battery is very low. If you were to allow the battery to get to low of a charge and it was an unprotected battery then you could have an issue. but that battery is protected so there isn't any worries there.

author
samalert (author)2015-05-11

How much time does is take to fully charge a cell phone from Dead.

author
shane better (author)2015-05-10

Isn't this really dangerous because of the heat and the lithium ?

author
Tomahawk92 (author)2015-05-10

I was planning the same ible in an altoids tin. good job.

author
M_the_creator (author)2015-05-10

That's really cool

author
tstevens-1 (author)2015-05-10

Where do you get the module?

author
betmac (author)tstevens-12015-05-10

i bought it from dx.com you can also find those on ebay

author
SubhashM (author)2015-05-10

Can you please expand the instructions of wiring...It is not clear which module to connect with battery

author
betmac (author)SubhashM2015-05-10

sorry

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SubhashM (author)betmac2015-05-10

Thank you a lot!

author
samuel123abc (author)2015-05-10

Cool project!