Filthy Edna 2
Available to buy online from the Lil' Monkey web shop
Edna 2 is also available as a 'lamp only' option (3.7v li-ion), without Edna battery box, for your own creative solutions. Examples could include a Petzl Duo box which stripped out can accomodate a 1S2P 3.7v li-ion pack (or 1 x 18650 Edna protected battery holder), an original Petzl Zoom box, or other battery box recovered from retired caving light.
Remember, keep 3.7v li-ion batteries dry or expect to damage protection circuitry etc. Waterproofing li-ion battery packs is essential if using Zoom box!!