Disable screen lock on power?

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http://forums.androidcentral.com – Hi, this is my first post as my Galaxy S2 has just updated to 4.1.2 I use the pattern option for my lock screen but used to use "No Lock" on ICS to disable the screen from locking with a single button click (for when I'm driving & the phone is hooked into charger) Since the update, No Lock (and a few other similar apps) no longer works except on swipe (no security!) Is there a way to disable the lock screen only when the phone is plugged into to charger on JB? Thanks for any help Nez (HowTos)