Sub ohm question.

Yes

But

What part of the mod? Did you check batteries are ok?

I find the RX gets hot but dna version don't

Please give more details

 

A battery shouldn't really get Warm. A Definitely Not Hot.

But is it the Battery that is Getting Warm? Or the Mod getting warm from the Atomizer?

What is your Setup?

 

Exactly the heat usually comes from big powered coils and filters to the mod

The rx gets warm on the screen if that's the mod you have?

Please tell us more

 

Your question is short on details. Batteries have temperature ratings. If the battery goes higher you are risking a problem. Regulated mods should have a safety feature that refuses to allow the device to fire if the temp inside the mod is above some limit. If you are asking about a mechanical mod may be you don't have enough understanding of the issues involved with those to be using them. Most of the accidents that start when the fire button is pressed involve mech mods. I don't use them.

 

the more power you draw from a battery the warmer it is likely to get.

 

I would suppose that one would get a bit warm if pushed a bit. Warm is unavoidable as you are using power to create heat. HOT, where its getting to hot to hold, uncomfortable, not good.
I alternate my mechs when they get a little to warm for me. Before they get to the point they are uncomfortable to hold.

 

Getting warm or even hot is be a direct result of approaching a batteries CDR. Mooch sets 100c for his testing as the upper acceptable temperature limit.
Also the atomizer will get hot during normal use, and this heat will conduct into the mod and therefore potentially into the battery as well.

Why bother with testing cell temperature? | E-Cigarette Forum

Choose a quality battery not a rewrap, be aware of it's genuine CDR, and don't exceed it.
List of Battery Tests | E-Cigarette Forum