Check whether my battery is original or fake

Hello Team,

I just bought DELL battery online and want to check whether it is original or fake. Here is the part number that is on the box 4YRJH.

The problem with battery is that it shows 68% and next moment it is 2%.

Battery product code : 

CN-4YRJH-PAS00-18P-192CI-A05

CAN YOU PLEASE CHECK AND CONFIRM.

Thanks