Hey! everyone My name is Steve.

Today I'm going to show you How to Make 4S 2P lithium Battery Pack

Click Here to See The Video

Let's Start

Step 1: Gallery

Step 2: Features

Output Power

5200 mAh @ 16.8V

Input Power " Charging "

2000 mAh Constant Current
16.8v Constant Voltage

Built-in Protection

Over Load Protection
Short Circuit Protection
Over Heat Protection

Step 3: Things You Need

Recommended Products

SUNKKO 787A+ Spot Welder - 1. https://goo.gl/WnYrRG

2. https://amzn.to/2yr81bX

NCR18650B 3400mAH Li-ion Battery - https://goo.gl/fTyde8

Where To Buy "Cheapest"

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Banggood

1. Connector Holder - https://goo.gl/Cyk76V

2. XT60 Connectors - https://goo.gl/Tm4rRQ

3. SUNKKO 787A+ Spot Welder - https://amzn.to/2yr81bX

4. 18650 Battery Pack Spacer - https://goo.gl/ba67t6

5. Nickel Plated Steel Strip - https://goo.gl/GgpGdq

6. Battery Protection board BMS - https://goo.gl/zcgqBJ

7. Black Silicone Wire Cable - https://goo.gl/bMmPid

8. Red Silicone Wire Cable - https://goo.gl/qMCbD7

9. Kapton Tape - https://goo.gl/KPagVx

10. Mustool® MT223 60W Soldering Iron - https://goo.gl/iH7d5C

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Amazon

1. Connector Holder - https://goo.gl/Cyk76V

2. XT60 Connectors - http://amzn.to/2gShZaJ

3. SUNKKO 787A+ Spot Welder - https://amzn.to/2M93P2b

4. 18650 Battery Pack Spacer - https://amzn.to/2M8HSka

5. Nickel Plated Steel Strip - https://amzn.to/2yqNuE3

6. Battery Protection board BMS - https://amzn.to/2trNVsm

7. Black Silicone Wire Cable - https://amzn.to/2MDAsWV

8. Red Silicone Wire Cable - https://amzn.to/2MDAsWV

9. Kapton Tape - https://amzn.to/2K3piJt

10. Mustool® MT223 60W Soldering Iron - https://amzn.to/2K5NBcZ

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Aliexpress

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Step 4: Assembly

First Step

Make sure all the batteries are at the same voltage and same capacity
Now put one by one into the battery holder
Now use Kapton tape to tape it all

Kapton Tape - it is used to avoid the heat basically it is a heat resistance tape

Step 5: Welding

Second Step

Now cut down the Nikkle plated strip tape at right length "See the image"
First, make a pair of 2 parallel battery as shown in the picture
and then connect all the 4 pair in series
This connection is called 4S 2P
You can also see the connection diagram above

4S - Stands for 4 Series

2P - Stands for 2 Parallel

Step 6: Meetup

Now use a multimeter to measure the battery voltage now I got a reading of 16.49V it may differ from mine reading is totally depends upon the charge of the battery
Now use Kapton tape to cover the back side of the BMS with several layers
Now use a double-sided tape to stick the BMS to the Battery