Omni v5 operation & fitting

gallery/blackrat_v5_l (1)

CustomDUO Omni modules are a simple push fit into the Petzl Duo lamp housing. Electronic connection is via the 2 pins on reverse of module which locate in the Duo bi-pin bulb / LED connection socket. Orientate Omni module in the body of your Duo, aligning the contact pins, and push fit module into place. Test operation of module. If module does not work immediately, then read about battery polarity below. The Omni v5 will work with all variants of the Petzl Duo (excluding the new 2018 versions which are factory sealed and not designed to be upgradeable in the future when LEDs advance).  


Programming power levels


To program spot and flood LED powers of setting 2, 3 or 4; switch on the setting you wish to adjust (using the main Duo switch). Note, the red indicator LED comes on momentarily whenever setting 1 is selected, so identifying settings 2, 3 and 4 is straightforward. Do not turn off main Duo switch while programming unless you wish to exit this function without alteration of existing set up.


Omni v5 fitting

Battery Level Indicator and Moon Mode


'Double switch' to operate moon mode (10mA flood), i.e. (swift double operation of switch, i.e. on-off-on). The red indicator LED will blink 1 to 5 times to indicate battery charge level. Lamp will run in moon mode until next switched off. 


The battery level indicator is set for 4xAA cells (Ni-Mh or alkaline), but can be set (via programming function) for use with 3.7v li-ion packs, typically only of interest if using a Petzl Duo headset with an own build battery configuration. 
3 second mode memory
Omni v5 features 3 second 'last' mode memory. When lamp has been on for more than 3 seconds in any setting and is switched off, then when subsequently switched on it will automatically restart in the last used setting. 

Thermal management


The Omni v5 incorporates thermal management in order to protect the module from over temperature operation. This may be significant if using high output setting for extended time periods. If the module is too hot, it will blink and discreetly reduce the power level of the setting being used, typically to a maximum of 350mA on each LED. Otherwise, normal function is not affected, and all settings remain available.


Batteries, power and light output 

As standard, the Petzl Duo uses 4xAA batteries. It is important to note that the highest power settings of the Omni v5 module, i.e. 700mA flood and 700mA spot, 1400mA combined, may not be achievable dependant on battery type (NiMh or Alkaline), battery quality / condition, and level of charge. Lamp condition is also a factor. If the batteries cannot deliver e.g. the 1400mA required, the lamp will operate as normal, but not at full brightness. The slight upside of this is that reduced power draw from batteries by default will result in extended operating durations. 

In our opinion, 1400mA is at the limit of what can be realistically achieved with Petzl Duo and the best AA cells, given the battery technology currently available. For best result we suggest low self discharge NiMh batteries, such as the 'Eneloop' brand.


The regulated power settings levels for modules are given in mA. To determine the approximate regulated duration of light on your battery arrangement at a given power setting, simply divide the mAh capacity of your cell pack by the mA power draw at a given setting. For example, using 2100mAh NiMh low self discharge AA batteries at a power setting of 350mA will give a regulated duration in the region of 5-6 hours.




Occasionally we come across an early (pre 2004) Petzl Duo which has been wired up back to front, and the polarity is wrong for the Customduo LED modules. This affected some, but not all early Duos, and these Duos are now rare. Polarity conscious LEDs hadn't been considered at this time so it wasn't important which way around the positive and negative were wired at manufacture. If you fit your CustomDUO module and it does not immediately work, chances are that your Duo is wired up back to front. The solution is simple. Reverse the batteries in the battery holder, i.e. positive to negative, and vice versa. The module will then work. CustomDUO modules are polarity protected, so you will not have damaged the module by finding this out. 


Alternatively, for the electronically skilled, the Omni v5 features solder jumpers that allow the polarity of the module to be reversed. Note, if you have suitable electronic skill to undertake this then you should be able to locate the circuit board jumpers without our help! 




When the setting you wish to program has been selected, press the v5 programming 'set' switch. The indicator LED will light to show that you are now in programming mode.


Using the 'set' switch, you can now loop through the spot LED power levels, off, 50ma, 150ma, 350ma, 700ma. Note, the spot LED will light up, but at lower light levels to avoid blinding when programming. 

At your chosen level of spot LED, press and hold the programming switch to set this level. The programming sequence will now move to the flood LED. 


As for the spot LED, you can now loop through the flood LED power levels, off, 50ma, 150ma, 350ma, 700ma. Note, the flood LED will light up, but at lower indicative light levels to avoid blinding when programming. Programming does not allow you to set both LEDs as off.

At your chosen level of flood LED, press and hold the programming switch to set this level.

The programming sequence for this power setting is now complete. The indicator LED will flash several times, and the Duo will then switch on at the new programmed level. Take care not to blind yourself at this point.  

The process can be similarly repeated for any of the settings, 2, 3 or 4.

3 second 'last' mode or 3 second 'first' mode


To switch between 3 second 'last' mode and 3 second 'first' mode, switch on Duo to setting 1. Press the programming button. Using the programming button you can now toggle between 3 second 'last' mode (the flood LED will light up) and 3 second 'first' mode (the spot LED will light up).

To set either of these press and hold the programming button. Once released, the indicator LED will blink several times to indicate that this choice has been set.
Battery level indicator calibration

To switch between battery type, switch on Duo to moon mode setting. Once the battery level sequence has finished, press the programming button. Using the programming button you can now toggle between AA batteries (the flood LED will light up) and 3.7v li-ion battery pack (the spot LED will light up).

To set either of these press and hold the programming button. Once released, the indicator LED will blink several times to indicate that this choice has been set.


Restore factory settings


This sequence can be used to restore factory default settings, including power levels of setting 2, 3 and 4, battery type and 3 second 'last' mode function.


With main Duo switch in 'off' position, press and hold the v5 programming button. Switch on the Duo, and subsequently release the v5 programming button. Indicator LED will blink several times to indicate that factory default set up has been restored.

Cree XP-G3

(s5 bin)

Flood Off





Spot Off (0mA)


24 lumens

73 lumens (1)

172 lumens (2)

310 lumens

Spot (50mA)

24 lumens

48 lumens

97 lumens

196 lumens

334 lumens

Spot (150mA)

73 lumens

97 lumens

146 lumens

245 lumens (3)

383 lumens

Spot (350mA)

172 lumens

196 lumens

245 lumens

344 lumens

482 lumens

Spot (700mA)

310 lumens (4)

334 lumens

383 lumens

482 lumens

620 lumens

gallery/v5 fitting



To switch between the four factory default power settings (see following table), in a looping sequence, use the down switch on the Petzl Duo. Switch on-off-on-off to sequence between settings 1-2-3-4 ... 1-2 etc. 












Factory Setting

Spot LED

Flood LED




(est.  using 2500mAh

1 (fixed)



73 lumens

16 hours

2 (programmable)



172 lumens

7 hours

3 (programmable)



245 lumens

5 hours

4 (programmable)



310 lumens

3.5 hours




5 lumens

includes battery
level indicator

To finish, refit the Duo front window. Holding window in position with thumb, refit the grey plastic bezel until the Petzl correct fitting alignment marks (on top of the lamp) are correctly orientated. The marker formed on the grey screw bezel needs to be somewhere in between the two markers formed on the top of the yellow moulded lamp body. 
Note - prior to fitting it is of course necessary to remove original reflector, bulbs, LED modules, etc.