TorchLAB ZeroRez Z41 Upgrade (twisty+momentary)

Product Information

Zero Resistance Twisty Z41 Upgrade

Like our ZeroRez Shorty, the Zero Rez Twisty is carved from solid brass (no spring), allowing more energy to travel from your battery to your LED or bulbs than any spring equiped clicky or twisty configuration. An enhancment of the Z41, you still press for momentary and twist for constant. For clicky function, see our McClicky Upgrade.

The benefits of the ZR upgrade are specific to non regulated (high amperage direct drive LED and standard drive incan) setups. Regulated multicell setups (including the Triple XPG) will not produce extra output from this switch. The McClicky upgrade provides full output for these uses.

The Idea:

A way to think of it is electricity and wires is like water traveling through a pipe to move a wheel. Volts is the pressure the water is under (force), amps is the size of the pipe (quantity of water), and watts is how much work winds up getting done, how much the wheel turns when the water hits it (power). LED(s) need a certain amount of watts/water. If you lower the volts by running on a single cell (smaller pipe), the only way to deliver the same amount of energy (watts/water) is by boosting the pressure/amps (water goes faster). But if you don't upgrade the pipes, they can't handle the extra pressure. So to with springs and switches. Lower the voltages and they either slow down the current or burst in the process.

The Zero Rez upgrade is designed for low voltage, high amperage setups. If you are running a high voltage setup (12v), the amps don't need to be as high to get the same watts. The McClicky is good up to about 5 amps. The ZR is good to over 20 amps. The Z41 twisty will not blow until well above 5 amps, but it will start retarding energy flow (resistance) well before that.

Installation:

Pull the spring from your aluminum cup from your Z41
Pull the aluminum cup from your Z41
Separate out the factory rivet
Drop in the brass ZERO RESISTANCE mod
Secure it, by tapping the factory rivet into the center
Enjoy your light brighter than ever before.

Caution:

Test battery fitment carefully the first time that you use this tail mod. Screw cap on slowly to be sure that you do not crush your cells.
As this lacks any spring, switch deactivation force now comes from above your battery. Smooth battery movement inside the flashlight body is vital.
This mod should work perfectly on any single cell bored SureFire®, and many other lights.
This mod will deliver all of the current to your drop-in that is available.
Use care when lighting up your direct drive setups.