Quick battery safety question.

I work at a vape shop and in my done time I build on our store rda.

I remember a customer telling me there is some type of equation you can do really quickly to see if you battery is able to handle a low ohm coil build without discharging too quickly and grenading.

I was wondering if anyone can explain this to me in laymens terms. (I’m new to electricity)

I usually build a .25 to .3ohm and run it on an MNKE 18650 battery. Don’t know if it matters but it’s a colonial mech mod with a darkhorse rda clone.

We sold out of batteries so to be honest I was bored as shit for a week. Today we got in VTC-4s, LG high drain and mnke 18650 batteries.

Both the LG and MNKE are 2500mah batteries. I was told by a customer the LG can handle low ohm builds so I grabbed the kanthal and made a dual coil build that reads .17 ohms.

It rips like a beast however I can’t handle liquids like cereal killa anymore due to the nic level, it has to be a 0 nic or I choke on the vapor.