Question What do i need to know about laptop charger before buying a replacement, and what pin size I will need ?

Dec 19, 2021
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My laptop is a Dell Inspiron 15 5567 with Service Tag 8BNWK22

My charger specifications are:
19.5V
3.34A
65W

It is positive polarity adapter.

Also, how do I know if it is small pin or large pin? (I am ordering online so need to know it) It seems like it is 4.5 mm.
 

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