In this weeks episode of tech Tuesday, we would learn how to build a simple battery management system to balance charge multiple Li-ion batteries simultaneously using tp4056 and Hi-Link ac dc 5v 3w Buck Step Down Power Supply.

18650 battery, 21700 20700 lithium ion battery

This same approach can be used to charge lipo batteries as well by soldering the lipo battery's terminals to the B- and B+ pins of the tp4056 charger.

This build is under 10 US Dollars.
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Part Links (Affiliate)
AliExpress
Hi-Link Power supply: https://s.click.aliexpress.com/e/_AgW9V1
TP4056: https://s.click.aliexpress.com/e/_AaInQF
4 Cell Holder : https://s.click.aliexpress.com/e/_A4r3Zv
Perf Board: https://s.click.aliexpress.com/e/_97NVYR

Amazon
Hi-Link Power supply: https://amzn.to/2O37XqO
TP4056: https://amzn.to/3cScvLj
Battery Rack: https://amzn.to/2YS3euc
Perf Board: https://amzn.to/36PbAHt

Alternative using IMAX B6 Mini
AliExpress
IMAX B6 Mini: https://s.click.aliexpress.com/e/_9hcTe7

Amazon
IMAX B6 Mini: https://amzn.to/3aHTIQ3

You can also use one of these already made multiple battery chargers
https://s.click.aliexpress.com/e/_9Q9nFw
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Channel Gear and Equipment's (Affiliate)
Amazon : https://www.amazon.com/shop/nerdbishop

AliExpress
~~~~ Multimeters ~~~~
UT61E Plus Multimeter
https://s.click.aliexpress.com/e/_Dkm...

UT204 Plus Clamp Multimeter
https://s.click.aliexpress.com/e/_DB4...

~~~~ Lab Bench Power Supply ~~~~
RD6018W 60V 18A Bench Power Supply
https://s.click.aliexpress.com/e/_Act4hO

~~~~ Oscilloscope ~~~~
DSO FNIRSI PRO Oscilloscope
https://s.click.aliexpress.com/e/_DBN...

~~~~ Soldering and Welding Kit ~~~~
KSGER T12 STM32 V3.1S Electric OLED Soldering Station
https://s.click.aliexpress.com/e/_DCG...

DH30 Max Portable Battery Spot Welder Kit
https://s.click.aliexpress.com/e/_Ddb...

~~~~ Testers ~~~~
USB Adjustable Discharge Load
https://s.click.aliexpress.com/e/_9HFFwe

RD UM34C USB Tester
https://s.click.aliexpress.com/e/_9H0yI0

USB Tester with Current Voltage Indicator
https://s.click.aliexpress.com/e/_9frmaK

Qualcomm QC2.0 & 3.0 | 5V / 9V / 12V / 15V / 20V Trigger
https://s.click.aliexpress.com/e/_DBK...

~~~~ Others Tools ~~~~
Xiaomi Mijia Screw Driver Kit
OLD Version https://s.click.aliexpress.com/e/_DmO...
NEW Version https://s.click.aliexpress.com/e/_Dlc...
NEW Electric Version https://s.click.aliexpress.com/e/_DDb...

Non-slip Metal Scalpel Knife Set with 40 Blades
https://s.click.aliexpress.com/e/_AmSdJe
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