CTrail

My batteries dont have a brand name on them i dont think, someone gave me them i really need to get new ones but it says it is 3.7v and 3400mAh. I found a pic of it online, here it is

I have a question about that ohms i should be running. The mod i have is a dual 18650 parallel mech mod (mod attached in a picture). All these ohms calculators and guides are pretty confusing to me and i was hoping someone could give me a good rages of safe ohms i can run. Thanks!