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Closed  ....  4th Nov - 14th Nov 2019

CustomDUO Shop

Bargain Bazaar

Other random bits and pieces !

Micro USB Li-Ion Battery Charger (3.7v) 

Rude Nora micro USB 3.7v Li-Ion battery pack charger. Charges pretty much any 3.7v li-ion battery pack (parallel wired li-ion cells), or single cell. Quality 20 AWG USB lead available. more info 



USB Li-Ion Battery Charger (7.4v)

USB powered 7.4v Li-Ion battery pack charger. JST connector. Suitable for charging Scurion caving lamps. Essential expedition accessory.  



Scallywag Charger

12v car charger for Scurion and Stenlight, and other 7.4v Li-Ion battery packs.



Petzl Duo Fixo Screws

5 off large head fixing screws for helmet mounting Petzl Duo.



Nora Micro USB Charger
Bargain Bazaar

Fleabi Modules

Fleabi LED inserts, with mini edison and bi-pin fittings, for this and that !! Limited stock, while available.


Out of stock 

Little Monkey Battery Box (2x18650)

Anodised aluminium alloy battery box for 2x18650 li-ion cell pack. The original Little Monkey battery box from 2007, fitted with larger cable gland (Batteries not included). 


£45  Sorry, sold out

Clear Plastic Lamp Window

Machine cut window, manufactured in UK. 69mm diameter, 5mm thick, 6 equally spaced holes for m3 clearance on circ 61mm PCD. Ideal for self build caving light. 



69mm Front Window

Oldham Mining Lamp Glass Window

Glass window, 59mm diameter, approx 4mm thick, for Oldham mining lamp.  Limited stock, while available.



Oldham Glass Window

CustomDUO Shop 

Image not available

Blind Bat Lamp Housing 

Machined aluminium anodised LED lamp housing plus fittings, from now discontinued Blind Bat light. 25cm dc cable included. Would suit DIY project. No return clearance stock.



Blind Bat LED light housing

The Online Shop allows payment with most debit and credit cards, without the requirement for a Paypal account. Add product to cart and option is offered at checkout. Customduo also accept UK cheque or bank transfer.  International orders welcome. We are currently shipping internationally (outside UK) at no extra postal charge. For more details please see delivery


Please note that we are a small manufacturing business. Officially we work Mon-Thurs (excluding public holidays). If closed for holidays etc we will provide notice on CustomDUO calendar.

We aim to despatch CustomDUO stock products within two working days, and generally the next working day. We make every effort to keep our on-line stock availability right up to date (and generally don't get caught napping). When placing an order, please ensure that your delivery details are correct, and also that your email address is current, so that we can keep you informed on order progress.


Before purchasing any Customduo product please ensure that you have read and accept the terms

Sump Donkey Heatsink

Sump Donkey Heatsink for Diving Canister Lamp 

Custom machined aluminium heatsink from Sump Donkey LED module, for diving cannister lamps. Would suit DIY LED conversion. LEDs / circuitry etc not included. No return clearance stock. 



Dusk Runner - bonkers !!

Ultra light weight runners wrist light, only 6g. Bizarre thing built mostly to see what can be achieved with latest low power SMD LEDs and cr2032 battery (battery not included).   


£5  (including mens 20mm velcro wrap around adventure sport style watch strap)






Dusk Runner

Petzl Duo Headband

Genuine Petzl Duo headband in 2 pieces. Not a universal headband. With 2x grey plastic cable clips. Intermittant stock availability. (Please do not order more than 1 of these without first contacting us to check current stock level)



Clear Plastic Square Window

Machine cut window, manufactured in UK. 50mm square, with 4 holes, for alloy project boxes of same size (50h x 50w x 20d). Project box not included.



50mm Square Window

Petzl Duo Halogen Bulb

Genuine Petzl Duo Halogen bulbs 6v (0.5A from memory), reclaimed from new unused Duos upgraded with LED modules. As you are on the Customduo website it seems highly unlikely that you will be wanting to buy halogen bulbs, but we have lots in stock, so just in case.



Petzl Duo 6v Halogen

Filthy Edna Battery Box (2x18650)

Helmet mounted battery box that can accomodate 2x indivdual 18650 li-ion batteries (protected or unprotected 2s 7.4v) with battery spring contact boards included. Could also accomodate self built battery packs of 2 cells wired together 3.7v (parallel) or 7.4v (series). Delrin box, alloy lid, O ring, 10 bar cable gland, helmet fixing bolt. Strong stainless lid clasps. Light weight 130g. No return clearance bargain, while available.  


£80  Out of stock

Oldham / Petzl Battery Box based caving lamps

Intermittant stock based on availability of reclaimed parts (Oldhams and Mk1 Petzl Zoom boxes). Rebuilt with new, more suitable cable. Ready for LED retrofit, or we can of course supply a CustomPITLAMP module. Read more about this classic cavers solution, and how to build you own (saving us the trouble).


£40  (Contact Us)

3 x AA battery holder

Sick of troublesome plastic AA holders with poor battery fitment and gash coil spring connections. Nora 3 x AA battery holders, 3.6-4.5v nominal. Fits Petzl Zoom box !! Comes with JST connector, but easily adaptable to your requirement.



Nora AA Holder

Voltage Gizmo

Quickly check state of charge / discharge of li-ion battery packs. Fitted with JST connector to suit 3.7 v battery packs such as Rude Nora (4.2v charged / <3v discharged). Can also be used for series wired packs. E.g. 2s 7.4v packs such as Scurion (8.4v charged / <6v discharged). Handy if wishing to store battery packs part charged !! Maximum voltage 30v.  




Petzl Duo Oval Lens

Petzl Duo oval lens (Petzl Duo lamp front window). 



Petzl Duo front window
7.4v USB Charger

Petzl Duo Battery Holder 

Petzl Duo replacement battery holder and lid. 




AA 'Expedition' battery holders for Scurion caving lamps

Works with the regular Scurion caving lamp battery box. Useful option for back-up, or expedition where charging could be problematic, or when your li-ion batteries have been confiscated at airport !! No return clearance item. Discontinued. more info


£14  Last few


Battery Holder

Stenlight Battery Pack 

Anodised aluminium alloy battery box (original Little Monkey box from 2008) with protected 7.4v 2.6Ah li-ion cell pack, chunky 4.6mm diameter cable, and connector suitable for Stenlight. Robust replacement for original heat shrunk packs. Fixed to helmet with shock cord. Weight approx 175g. 


£60  Limited Stock - Contact Us

Petzl Duo Battery Box
Nora Battery Charge Gizmo
Petzl Duo headband