How To Build Your Own DIY 9000mAh USB Power Bank! 

Thank you - 4 years after the release of your video it helped my with my project!

That´s some real backup power !

Very nice. I love salvaging 18650s from laptop batteries. Those boards are a staple for me too! Nice job putting 4 cells in this project. Loved ur vid.

This video is a bit different, but I hope it is helpful, if you have an old laptop battery, which you want to reuse. If you like this video, give us a thumbs up and subscribe, because this helps a lot. Thanks, guys!

Simple and i think build my own after look your video. Thank for sharing

so glad to find this video. can the batteries charge and discharge at the same time? so if this was connected to a solar panel and charging something at the same time would it work?

Great video, this will be very helpfull for me. You seem to know what you are doing so I would like to ask for your opinion. I’m thinking to use a setup like this to power portable Arduino projects for longer periods of time but I would prefer to cut off the load at a voltage of about 3V instead of 2.5V as used in the protection board. I’ve wondered why all the protection boards cut off at 2.5V instead of 2.9V like most batteries require but apparently that has to do with the voltage drop during high loads and cutting of at 2.5V makes sure the power doesn’t shut down during those temporary drops under loading. However I will not be using high loads, making the voltage drop under loading smaller and therefor the 2.5V cut off seems too low for my usage. I read that the voltage drop from 3.0V to 2.5V happens relative quickly and that the 18650 cell recovers to 2.8/2.9V almost immediately after the load is cut off at 2.5V but as my projects don’t need much power I am worried that the period in which the cell is between 3.0 and 2.5V will be too long and might damage the batteries. To get the load to cut off already at 3.0V I’m thinking to use the S9V11MACMA step-up/step-down voltage regulator (www.pololu.com/product/2868). It can step up the voltage to the level I need for my projects but, more importantly, it can also cut off the power when the voltage drops below a set level. Output - and cut-off voltage can be adjusted with potentiometers on the board to e.g. 5V and 3V respectively. The board would replace the step-up booster and should cut off the power before the TP4056 would. Do you think that will work as intended or will it introduce complications in combination with the TP4056? Also I wondered if it might be a good idea to add a glass fuse to each cell to isolate it in case of a cell failure for additional safety. Probably a bit of overkill as it is only a small pack, but the costs are minimal and the idea of burning my house down is worrying enough for me to consider putting them in. Obviously I would need to use 4 separate cell holders and parallel connect them after the fuses. Any thoughts on that? Maybe I’m just worrying too much.. :)

So much thank you!

Excellent video Would you be able to remake this project with more powerful batteries like the 33650 lifepo4 cells? Faster charge/discharge, more usb slots and an lcd screen which can be turned on/off

great video. thank you

Good work. I have made a similar battery bank. My biggest issue is that the over-discharge voltage of the TP4056 is too low - it cuts off at 2.5v, but that is pretty stressful for LiPo cells. 3.0 or 3.3v would be better. I am in the process of making my own discharge cutoff circuit with a higher cutoff voltage.

u made is so simple for me

Im really new to electronics but ive read a lot of people on reddit and forums saying its unsafe for a single charging board to be used on paralell 18650 batteries but i can see that you have done it with no issues. They said: ""You shouldn't put batteries in parallel, especially rechargeable batteries. They will never be "exactly equal" and one battery can discharge into the other which is not efficient and could potentially damage the batteries and maybe overheat and start a fire! "" ""You can put batteries in parallel if you add a diode on each battery to prevent reverse current, but you'll get a voltage-drop across the diode (0.7V for a regular silicon diode) and you'd have to bypass the diodes for charging."" Is this something to worry about as i want to do it and it looks like you have done it succesfully but i need it to be safe.

can you add more usb 1a ports on the same battery so i have say like 4 port charger with 4x single usb 1a chargers ?

Great explanation, Sir! If I don't use the switch, would it be broken?

How much time it will take to charge 4 batteries?

Shall I use another switch in between tp4056 and batteries....? Is there any power loss occurs during charging...?

hi may I know if I can use this while charging? thanks!

Nice bro

Hi what's the minimum mA load that triggers the cut off of the charger?

Is there a better charging module to use?

and how can I use the batteries while charging at the same time like in a phone / laptop...? I want to implement this into a battery keyboard

Bhayya good morning. Can I connect a boost converter to TP4056 while it is charging a battery? Please reply

nice, but you should use one charging module and one output module for each 18650 cell. If not, you can damage the cells

hi is it ok to connect 3 batteries 2600mah ,one of the battery is showing 3.6v ,other 2 shows 3.7v ,also can i use Miniature Slide Switch - 2 Way On Off - SPST Rating 0.5A 50V DC

Hello... Great video ☺️... I have a question, if i use normal batteries so without recharging what I do?

Is that board not for single cells? How does the BMS work?

Great video, is it possible to use and charge at the same time with this set up or will it need a more robust charge controller?

mantap bosque apakah batera cgr bagus bosuque untk power bank dan buat tenaga surya saya blm mencoba nya kebanyakan merek sanyo atau samsung

Can I use this tutorial with 3xAA battery pack of Ni-Mh 2800mah (1,2volts for each one) in series which create 3,7 volts? I use this pack to power the led indicator of my electric scooter. I charge these batteries with an external charger and then I put them back in the DIY 3 SLOT. So I want to add to these pack, only the USB charger function to connect my phone or other device if necessary. I don't want to charge this pack as you do in the video. The question is, if I need both module, the tp4056 and upBoost or can I use only the Up boost module that is what I need to charge my device? I repeat, i don't want to charge my battery pack with USB. I only want to use it as a charger for other device

Tp4056 module have 1 amp charging current n also have output 1amp then how it would b 9000mah

I want to build my own battery pack with 12 of those 18650 batteries.. is it possible to add more usb outputs and a small display that displays the battery percentage? And how would i assemble everything together? Are there some instructions I can look up to build a battery pack with the parts I need?

Thanks a lot for the great video. One question please: how much time does it take to charge the 4 batteries as the 1 amp charging current will be divided by 4? (250 ma for each battery)

what will happen if connect batteries in series

How about if i want 2 usb port?

DOES TP5000 WORKS ON 4 PARALLEL LIFEPO4?

Excuse me, I have a question why in this video use one tp4056 but I saw in another video use four tp4056 for 4 slot 18650 battery. Is there any difference using 1 or 4 tp4056 ? I will have a project with three 18560 batteries, tp4056 and solar panels. so I'm looking for a reference, thanks for video 👍

Big thumbs up for sharing!!! I made the same project and used 2200mAH battery. But my TP4055 IC is HEATING up very much, RED LED is glowing too while charging.. is it normal for the 4056 IC to heat up? (I am using 5volt 1A charger as input to this circuit)

Connect both cells in parallel after balancing them first. Don't connect batteries with more than 0.2V difference in parallel as this can risk fire and explosions

where is the BMS and what are those connections dear, you need to read and watch more about 18650 batteries Thanks Regards

Is it possible to get 12v 2a DC output for external monitor and 5v usb output for an other device? And than add another adapter to it to charge it? Thanks!

Apa tidak panas kk untuk modulnya...

But can you charge and discharge at the same time can you demonstrate this little battery pag by plugging in something that uses power in plugging in the charge Corp at the same time

been thinking lately.... Some people say tp4056 is designed for only one battery. But as some videos i saw it can be used with 4...I would like to be enlightened

Can I use this setup and a single TP4056 if I were to use 75x 18650 batteries in parallel?

No need to balance the cells?

Nice 😎

Full change battery time

Can i use a newer version TYPE C charging module to this sir?

sorry to bother can you prove this still works and is safe,it does state the max Ma is 1000 & how did you get rid of the heat ?.....Great video by the way im soo interested .

Hello, please tell me you can connect two batteries to one such module

Cool, but that is going to charge really slow :/ It takes about 2 hours for my tp4056 board (Same as one in video!) to charge one!

Great , I have a question please my tp4056 has an input voltage 5V and 1A but gives an output 0.13A why?

Supper 👍👍👍

I wonder if it has over discharge protection... And how will the batteries voltage will look after the TP4056 decides the voltage is too low. Will it happen when the avaragle voltage of all 4 batteries reach around 3V? thanks :)

Great, I have a question Is this auto shutdown when no load

I would be afraid of this because it lacks a real BMS. BMS modules are cheap that can handle up to 4S. TP4056 is for 1S for 2S, 3S, 4S use "4S 30A 14.8V Li-ion Lithium 18650 Battery BMS Packs PCB Protection Board Balance Integrated Circuits".

How to connect more TP4056 ( supplied from the same power supply ) for faster charging ?

I’m a bit worried about the last battery, looks like you have cut into it. But otherwise great video!

why don't you use a tp4056 for each battery ?

Bro will it charge all the battery equally How will it get balanced charged as that module is made to charge only a single battery Please reply

Nice 👍🏻👍🏻 🇮🇳 || Kuki 15|01|2022

In confused. If you have all the batterys in parallel how come the voltage it is giving off is 5 volts when the batteries are rated 3.7V? They aren't in series so how did its voltage increase to 5 when its in parallel?

Hi, can I have the wiring diagram thx

hi, should the load be disconnected when the battery is being charged?

1 TP4056 for 4 18650 batteries to charge in a row.. wouldnt it take so much time to recharge all 4 batteries?

Can you charge and discharge in the same time ???

1 charging module is inuff for 4 18650 battery's?

Is there an easy way to get scrap laptop batteries? Ebay they are quite expensive and have huge postage costs, when you ask local recycling centres they just reply 'we only sell to licenced authorized recycling companies'

can you add usb boards in series ?

Tp4065 is not made for multiple batteries

Two links show me 404 Error

What is the max output A?

Sooo,i think that tp4056 is single 18650 battery charger, this goes weryy hott

can i have a link to the 5v 1a usb output please

Nice but this way TP 4056 might be getting overheated.

Isn't that a single cell charger? I use them in my projects. Could I charge 4 with it with out hurting it?

Hello, Is the "power" button mandatory ? I am a bit surprised with this.

Have question anyone answer please How many battery can i connect to the module in parallel

This is very slow charging. Unless you need to use 4 charging modul

It's support 3.7 v 20000mah battery?

Hmmm, interesting👍

What is the full charging time

I'm wondering if the switch is necessary?

With this circuit board can we make 20,000 mAh power bank ?.

sir how much volt we will get from this device

Where do you get the parts from?

hi i need your help for my project plz help me.. how cn i get connected to u

What's maximum mAh use?

They need 6v to operate not working

yea i'm just going to buy a battery bank

4 battery only 1 TP 4056 model ???

This is rechargable ? Please reply☺😊

That Red board DC-DC boost convert 3.7v to 5v to charge your phone, but it only support up to 600mA. So, you charge your phone super slow!!🤣🤣 hahaha..That red board only suitable for use in low current Solar panel circuit..You should change that red board to fast charging module

this is not a good method, in this way you just have to unbalance a cell and you risk ruining it. There must be 18650 TP4056 for each cell.

This will fully charge in 9hours with that TP chip.

that will take a week to charge that. trust me

why the warning about the fire hazard? I know your trying to protect yourself but seriously, what could happen? .... I'm just trying to understand the fire hazard exactly.

Send it to pakisran😆😆

BRO CAN IT WORK ON 21000MAH CAPACITY?