thats not atty lock, thats just setting a new coil or not.You press and hold up button for same atty and press the down button for a different atty
on the authentic, atty lock was introduced when enough people complained about the dna40 atty resistence refinement feature which pulses the atty every 5 mins for an hour of sitting idle. this somtimes resulted in lower or higher resistance readings compared to when you screwed the atty on initially. the user could hold down the up and down button together for 3 seconds and it would lock in the atty resistance and not use refinement feature. older dna40's only had power lock, locking wattage adjustment, by holding up and down buttons.
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