We will be closed 19th June 2021 - 28th June 2021

CustomDUO Shop

CustomPITLAMP Modules


LED upgrades for mining lamp conversions

CustomPITLAMP 2-tone

Latest version of our effective and stylish LED conversion modules for mining lamps. Ever popular solution with cavers, converting Oldham and CEAG headsets into caving lights. New simple format with 3 light settings, 170 lumen flood, 440 lumen focussed spot and 25 lumen low level. 


Muds Wheat-LED

LED conversion module for Koehler Wheat Lamp. A bit of retro upgrade fun for lamp once widely used by US cavers. Yeah, while available :-)



Wheat LED

CustomDUO Shop 

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

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 appropriate cable. £40 to £60 dependent on condition of core parts. 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).


from £40   In stock - contact us

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 2 AA Battery Holder


CustomPITLAMP LED Module

Cable gland and cable for Oldham caplamp

Quality cable gland and 4.8mm diameter cable (0.5m) suitable for caving lamp build based on pairing Oldham cap lamp with helmet mounted battery box etc etc.   



Oldham cable conversion

Oldham Mining Lamp Glass Window

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



Oldham Glass Window

Petzl Battery Box

Mk1 Petzl Zoom box. Mint condition. Read more about this classic cavers solution 


£15   UK delivery (+£5 international)   


Currently out of stock