My mod needs 3 batteries to power up, is it safe if i use 3 different coloured batteries to power it up?
exactly,Sorry couldn't resist,and welcome new member.Best bet is to use three of the exact same batteries that are the same age and all cycled (charged/discharged) the exact same amount.
Sounds like you need some education about batteries.My mod needs 3 batteries to power up, is it safe if i use 3 different coloured batteries to power it up?

It has nothing to do with ' their ' rules.
The OP asked " is it safe if I use ", it is never safe to use obviously mismatched unknown cells in a 3 cell power device.
