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Before Starting if you bored of reading you can check out my YouTube Channel for Full video tutorial.

So lets get started

Step 1: Gathering Parts

List of Parts:-

18650 Li-ion cells

TP-4056

Step up module

Wires

Soldering iron

Solder wire

Case

and a bit of Patient.

Step 2: Building the Battry Pack

1) Before building the battery pack check that voltage of both the battery it shall be same.

2) I used some hot glue the keep both batteries together you can even use tape or a heat shrinking tube.

3) Solder anode with anode and cathode with cathode of the batteries.

4) Battery pack is complete !

Step 3: Making the Circuit

1) Connect the cathode of battery to -ve terminal of TP-4056 and the step up module.

2) Then connect the Anode of all three as shown in the 3rd image.

3) Then adjust the output of step up module to 5V using the potentiometer

4) And at the end connect output of step up module to USB port.

Now you can charge your Mobile but ........

Step 4: But.....

You can use this circuit if your mobile uses less than 700ma

but I have an idea for that !

Step 5: Problem Solved ?

I used an pcb from old power bank which claim to have capacity of 10000mAh hahahahahahahaha not funny :p

Or

Use this DC 0.9 - 5V , 3V To 5V USB Charger Step Up Module Mini DC-DC Boost Converter

Step 6: Final Step!

1) I removed all the SMD LEDs and the Push button.

2) Then I soldered 5 mm white leds and a push button on the new wires.

Step 7: Congratulations !

Okay now our power bank is complete :)

dont forget to give it a thumbs up and do check out my YouTube Channel

https://www.youtube.com/channel/UC6Mfo-7o62yj3pStlJxh8sQ

<p>Very nice</p>
<p>Thanks for the idea!<br>Can I attach more batteries in parallel? Will it affect the charging module?</p>
<p>Yes But charging time will increase by number of batteries attached one battry takes about 3 hrs to charge so dont freak out when you get high charging times its just normal </p>
<p>Very nice, might also want a step down converter and remember, some 18650 cells have built in current limiting and any up/down converter also has a current limit which may, or may not, limit the useful current even more.</p><p>Oh, just a friendly word hint, the English language is a real &quot;pain&quot; we have many words that sound alike and are spelled differently and mean different things. A real good example is, to, too, and two for one. :) The word &quot;Patient&quot; is a person under a doctor's care. The word you wanted to use was &quot;Patience&quot; meaning a person is tolerant, able to handle disappointment and continue.</p><p>Thanks again for posting your instructable! Also, your use of English is far better than mine would be of your language, please continue to post &amp; expand you knowledge both of electronics and the painful English language. (Which most of us who speak English as a first language still mess up as well!)</p>
<p>Mine don't have inbuilt circuit protection. And thanks for telling mistake of Patient word. Actually Doing youtube and video editing is pain so some times I do mess up with it when tired </p>
<p>Nice work, I've been thinking about turning a large pile of excess 18650s I have into new guts for an old powerbank. Nice to see it already done. I'm going to use an aluminum project enclosure (and very careful isolation/shielding) to make mine a little more robust.</p><p>Thanks, good 'ible!</p>
<p>This is a wonderful project!!.. Thanks for sharing!....</p>
<p>Did you ever try to write in a foreign language yourself.</p><p>At least he's an enthusiastic person who makes something.</p><p>You have probably two left hands and you are jealous of him.</p>
<p>All nonsense..no protection circuit...you can damage your phone dude</p>
<p>If they are good quality batteries they should have built in protection but if they are cheap chinese batteries it would be good to have a dedicated usb input with the necessary protection in it </p>
<p>as long as the boost circuit is set to 5.2 volt they will be no damage and protection cirsuit is only needed for the first idea to stop over discharge</p>
<p>on my board there is TSP 2511 so i dont need to worry but second option needs to be worry </p>
<p>i only so the first half with the charge controller and the boost converter i had not scene the part of this tut where you use the salvaged unit so all my comments where to the diy unit not the salvaged unit</p>
<p>The board which I am using is having TSP 2511</p><p>check the data sheet . yes if you use the second one you will damage cells.</p>
<p>The board which I am using is having TSP 2511</p><p>check the data sheet . yes if you use the second one you will damage cells</p>
<p>I have a couple that I built, not to output to USB but with plugs that accept standard cables. I have one step up and one step down. Each are powered by three 18650's and have adjustable power converters with meters attached. I have them in clear cover project boxes and use them almost daily in my projects, much better then a large 110 volt power supply that you need to have near plug ins. I take mine along on our winter excursions down south to avoid the snow and cold, that way I can keep up my electronics hobby in the Arizona desert as well as on the plains of South Dakota.</p>
<p>they dont hald make some bold claims about capacity on these battery banks i had a few claim to be 20000mah and or only 2000 mah</p>
<p>true</p>
<p>you have no protection circuit for the cells so they is a very good chance you could over discharge the cells and kill them</p>
<p>The board which I am using is having TSP 2511 </p><p>check the data sheet . yes if you use the second one you will damage cells.</p>
<p>i was refering the the li-ions charge circuit and boost circuit not the salvaged board from battery bank</p>
<p>kid i have a problem with a power bank, it claims to be of 50.000mAh when i plug the cable for charge it the led blinks like if its charging but its not working it dosnt charge, i open it up and is missin a Coil so the problem can be because of that right? if i solder a new Coil it will work fine??? im really instrested on this and im waiting for your answer!! thanks!! from Venezuela</p>
<p>Yea try that out if that does not work but the module which i have shown </p><p>i.e</p><p>https://www.amazon.com/Icstation-Supply-Converter-Module-0-9V-5V/dp/B01FK119O4/ref=sr_1_1?ie=UTF8&amp;qid=1467257867&amp;sr=8-1&amp;keywords=DC+0.9+-+5V+%2C+3V+To+5V+USB+Charger+Step+Up+Module+Mini+DC-DC+Boost+Converter</p>
<p>Cool power system.</p>
<p>thanks</p>

About This Instructable

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Bio: Hi, I'm Nemeen !, Electronic and robotics enthusiastic. This is my channel 'Nematic !' I will be uploading on and about awesome Electronics Tutorials, Projects and ... More »
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