CustomDUO 

CustomDUO design and manufacture retro-fit LED modules that significantly upgrade the original Petzl Duo, almost certainly the most widely used caving light globally.

We also of course manufacture the Rude Nora and Filthy Edna ............... the Little Monkey caving lights.

Based in the UK, Customduo / Little Monkey has been designing and manufacturing caving lights since 1995, introducing amongst the first commercially available white LED caving light solutions in 1997. We manufactured our original aluminium Little Monkey lamps in 2008, with Rude Nora and Filthy Edna lamps following soon after.

Lil' Monkey Caving Lights now on Customduo website !

v42 module - Customer review  

LED Module for Petzl Duo

(New 2025)  Nora ABS Battery Boxes 

(New 2024)  Rude Nora and Scurion li-ion USB-C chargers  

'Switch mode' USB-C smart chargers. For 3.7v parallel li-ion battery arrangements, speciifcally Rude Nora and Filthy Edna caving lamps.

Also available, 7.4v version for 2s series wired li-ion battery packs, suitable for Scurion lamps.