Introduction: How to Make 18650 Li-ion Charger Station for a Budget

A lithium-ion battery or Li-ion battery (abbreviated as LIB) is a type of rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging. Li-ion batteries use an intercalated lithium compound as one electrode material, compared to the metallic lithium used in a non-rechargeable lithium battery. The electrolyte, which allows for ionic movement, and the two electrodes are the constituent components of a lithium-ion battery cell.
Lithium-ion batteries are common in home electronics. They are one of the most popular types of rechargeable batteries for portable electronics. Because there are so popular i decided to make a cheap charger that everybody

can replicate at home.For this project we going to need the following stuff:

Some charge board module for charge control the battery 4.2v fully charged 3.7v nominal and 3.0v empty

18650 Battery holders

Case or cardboard


So let's get started

Step 1: My Source for 18650 Li-ion Battery

I take the battery from Poundshop power banks and inside these 1£ power bank there is the small module,

the battery,plastic casing,some rope wire thing and for small application this batteries ar more then ok

thi is write on them 18650 1200Mah but i dont think for that price is the actual power but 900Mah is good enough

for lights ,small motors like pc fan,relay,radio,charge the smart phone with 4xbattery 2 times fully charged

and mannage to power multiple usb devices for couple of hours.This charger that we will make charge the batteries 4 of them separattely with 4 individual controllers

Step 2: Charge Modules Tp4056

This is the module in charge of charging the 18650 to 4.2v and the stop the charging process

and they have a over protection of low voltage for 3.2v they flash a blue led and disconnect the power

they required a 5v power supply of aprox 1A they are not pollarity protected so if you connect the battery in wrong position boom the small charger is burned

Step 3: Power Bank Poundland

All the stuff that you end up when you buy this power bank

First thing you have to solder wires like in the picture and jjust connect the charge module

according to the battery holder and remember do not reverse the battery

additional you can add some switches on all the modules

put the parallel connections and connect to the power supply

it has to be at least 5v 1.5A

Step 4: Cheap I Max Charger

As emprouvement we can add a constant current tester

can be made by another power bank in between battery and controller connect the multimeter

as a load we going to connect a usb lamp because in the discharging process is no need to loose the energy

we gonna power this usb light and a start -stop clock to record the time

At the end of the discharging process we will find the capacity of battery by multiplying the time with the power consumption /60

Thanks for watching and please visit the channel on youtube.


RobertC2 (author)2017-05-26

Love those little single cell power banks! Very useful for parts!

I made a powered speaker for my sister that uses those as swap-able drop-in power modules with no modification! One bank is powering the speaker, while the other bank is charging elsewhere from a smartphone charger. Or, you can take several pre-charged power banks with you for outdoor parties...


Yes very useful you can visit noskillsrequired youtube channel i hav made some improuvement like 3 in parallel to have some real capacity,2-3 in series with no modification and it output 10v(2series) and 15v constant (3power bank in series) i will test some battery i have tested 1 and it has 1024mAh so very useful all the best

Swansong (author)2017-05-18

That's a great simple build, thanks for sharing :)


No probs check the video in more details is there somewhere all the best

rafununu (author)2017-05-19

Sorry but I don't understand, you're taking already mounted modules, dismount them, and remount ?


This are individual cheap power banks and the chip inside is very usefull thats way i take them apart harvest the batterys

and chips and remount them on a 18650 cases to be more accesible for charging batteries for many project if you will buy the chips are the same price 0.50-1.50$/piece Tp4056

About This Instructable



Bio: Hello friends i show how to make stuff with no skills easy to replicate step by step from powerbanks,generator,invertors and so on thanks
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