Hello everyone.
I want to use this module 134n3p to charge 18650 batteries. I wanted to know if someone can tell me how many batteries I can put in parallel, if in fact more than one can be put.
Thank you.
It's a bad idea.
Unless you can guarantee the batteries came from the same manufacturing batch in the factory it is not safe to put batteries in parallel unless you put a diode on each one befor you join them to prevent cross charging.
Generally a very bad idea to charge batteries in parallel unless they are very well matched to start, and are then kept permantly connected and used in parallel.