After watching this video, you can use charger ICs in your project instead of charger modules. In this video I examined datasheet of TP-4056 charger IC in detail. In addition I answered these questions below.
Why some batteries have 3 terminals?
What is most simple and basic method to charge a battery?
What happens if someone charge batteries directly using power supply?
What is difference between 2terminal batteries and 3 terminal batteries?
What is best voltage for charging a battery?
What is best and safe current limit to charge a battery?
Why there is a current limit on most of DC power supplies?
What does yellow terminal of rechargeable batteries do?
Why we have to limit current when charging batteries?
What are 2 phases in charging batteries?
What is a precharge in charging batteries?
Which charger IC is best?
How to select best charger IC?
What are important parameters in choosing charger IC?
Here in this video you will get answer of these questions