Hi @finpaarmun
Here's an image showing the Lenovo part numbers¹ for all the batteries that are compatible with the laptop.
Search online for the ''part number only'' to find suppliers that suit you best.
Here's the [https://download.lenovo.com/consumer/mobiles_pub/yoga_c740_series_hmm.pdf|hardware maintenance manual] for the laptop. Go to p.29 to view the procedure to remove/replace the battery.
[image|3592329]
(click on image)
¹ The ''Substitutes (3)'' link for each battery just shows the part numbers for the other 3 batteries shown in the list.