inside there is a drop-in R2 with voltage from 3 to 18 volts!
I used a replacement (refill) ballpoint pen finished. I cleaned and cutted I printed small labels. I put the label inside and I closed with the end of the refill. I brought out the thread from the hole. one for each torch with drop-in. After that, you impossible to fail batteries
(I have 21 drop-in P60 and I was starting to make confusion)
Silly question - isn’t that how the P60 format is supposed to be used? If you need 21 different light sources (e.g. normal LEDs, warm LEDs, multicolored LEDs, incans, IR emitters, etc), you just get 21 drop-ins and 1 host, instead of having 21 different flashlights.
I got a couple Nailbender’s drop-ins and he would stick the description on the side of the reflector.
That gave me the idea to just use a Sharpie on the side of the drop-in and write what exactly it is and who I got it from (Manafront, Kaidomain, etc). Of course your method you don’t have to open the light up.