Just finished my first, (very basic) box mod.
I scrounged up a Licorice Tin (Sweeden), a momentary switch, a locking on/off switch, a cellphone battery (using the busted cell phone to charge it), 1/4" C clip, a piece of slot cover from the back of a PC, and some stick on rubber insulation.
I had two of these obsolete phones, one totaly dead, one works but the screen is dead.
I removed the spring loaded terminals for the battery from the dead one and tossed the phone.
Drilled a hole in the top and one on the side (sized for the atty and the momentary button)
Put the 510 atty through the top hole and secured in place with a 1/4" C clip. (may need a thin metal washer to make the atty tight against the tin. Since the ground passes through the metal tin, the atty needs to make solid contact against it.)
Soldered wires to the spring loaded battery connectors and mounted at the bottom of the tin.
Placed the battery into position then trimmed down the Slot cover from the PC so that it presses the battery into the terminals.
Soldered the ground to the tin, soldered the positive to the master switch, then the momentary switch. Secured the Momentary switch to the hole in the side of the tin. The end of the positive wire just slipps into the center hole on the atty.
NOTE: There is stick on rubber between the tin and the battery as well as between the tin and the battery terminals. You can see a piece of it stuck to the "door". This is to prevent any positive leads from coming in contact with the case.
Pretty basic, but the battery definately lasts longer than stock 510's, (haven't run it down yet, been using it off and on the last 8 hrs.)
My collection:

I scrounged up a Licorice Tin (Sweeden), a momentary switch, a locking on/off switch, a cellphone battery (using the busted cell phone to charge it), 1/4" C clip, a piece of slot cover from the back of a PC, and some stick on rubber insulation.
I had two of these obsolete phones, one totaly dead, one works but the screen is dead.

I removed the spring loaded terminals for the battery from the dead one and tossed the phone.
Drilled a hole in the top and one on the side (sized for the atty and the momentary button)
Put the 510 atty through the top hole and secured in place with a 1/4" C clip. (may need a thin metal washer to make the atty tight against the tin. Since the ground passes through the metal tin, the atty needs to make solid contact against it.)
Soldered wires to the spring loaded battery connectors and mounted at the bottom of the tin.

Placed the battery into position then trimmed down the Slot cover from the PC so that it presses the battery into the terminals.
Soldered the ground to the tin, soldered the positive to the master switch, then the momentary switch. Secured the Momentary switch to the hole in the side of the tin. The end of the positive wire just slipps into the center hole on the atty.
NOTE: There is stick on rubber between the tin and the battery as well as between the tin and the battery terminals. You can see a piece of it stuck to the "door". This is to prevent any positive leads from coming in contact with the case.
Pretty basic, but the battery definately lasts longer than stock 510's, (haven't run it down yet, been using it off and on the last 8 hrs.)
My collection:
