The user changeable 18650s are useful feature, but I feel unsure about people changing these underground in wet conditions. One has to respect LiIons as they can bite. Protected cells carry a metal tread from +V down to the protection PCB mounted on the base and any damp here will soon cause this to corrode with resultant complete loss of power.
I have tested LiIons to destruction in diverse ways!
I dont want take this off thread but to the best of my knowledge there is only Stenlight and me offering sealed, reasonably priced, LiIon power packs where it is economically viable to purchase and carry a spare.
I gave this matter a lot of consideration and this seemed to me the best way to go.
Anyone have thoughts?
Back on thread, I certainly like the lamp, it looks real brick you-know-what and eminently suited to the underground.