So I decided to make it myself as for laser alarms it is good to have a laser run on mains.
Step 1: Material Required
Portable USB charger (don't go for expensive one I used one of ₹35 )
Step 2: Cutting Laser
Scratch out the outer colour of laser
Soldier one wire to upper leg of the push button and one to the scratch metal area
Step 3: Body
Step 4: Charger
Cut the lead and take out red and black wire . connect black wire to negative wire of laser and positive to switch attach other wire of switch to positive of laser.
Attach the wire out to main from charger to a two pin a fit all the components within casing .
Step 5: Colour
Go for your home security whole night without thinking of changing cells but save electricity switch during day.
Thanks and give nice comments.
Step 6: Update
well that all in the update and if you like it then comment.
i will keep bringing new unique instructables in future.