Rda before battery? Or vice versa?

[Rordog17]

I remember reading somewhere that you should always put the rda on before the battery or vice versa but I can't find the same warning again?

 

[WaitFor1t88]

on a hybrid mech? atty screwed down first

 

[mattyk2010]

^^^^
This but to be honest I just do it on every mod [emoji6]