99.9% of the time, I use only AW protected cells in my Pila IBC charger. I do have the Tenergy 3v "blue-label" RCR123a cells and the dedicated Tenergy charger to go with them. I obviously can't charge them in my Pila 3.7 charger, even though it is very good quality, because of the voltage difference. I got the Tenergy cells mainly to use in my Surefire A2 aviator, which was stock at the time, and even though the bulb assembly is voltage-protected, there was some discussion here about whether using 2x 3.7 volts would overdrive the leds and end up damaging them. Fitting the Tenergy cells in the Aviator is a close fit, and I had to carefully remove the outer wrap (which identifies what it is!), leaving only a thin clear inner wrap keeping the wire running down the side from making contact with the inside of the battery tube, and shorting out. I am now rethinking this strategy, since I have custom aftermarket led "rings" for my Aviators that are voltage-protected. I am considering buying some AW brand "protected" 16340 cells to use in my Aviator, which I can then charge in my high-quality Pila charger. My main concern is whether or not the AW cells will fit in the Aviator battery tube, especially because I don't think AW protected cells have an additional inner wrap. I have heard of people gently reaming out the inner diameter of their Aviators, but I don't know if I'm up to doing a good job of it. I will probably buy 2 AW 16340 cells, and see if they fit. If they do, I will probably just chuck my Tenergy cells and charger, so nobody going through my stuff after my eventual demise has the chance to get batteries and chargers mixed up. The Tenergy cells have always worked for me, but I am a little leery of the quality, although it's just a "feeling".
Has anyone here on CPF been able to comfortably fit AW protected 16340 cells in their A2 Aviator?
Edit: I have been reading some old threads and just answered my own question. AW 16340 cells might fit in an A2 (especially a late-model one), but the chances of them fitting are statistically small. It looks like IMR 16340 cells are the way to go in an A2.