I've been using a single 18650 in my Sigelei Spark. Running .55 at 4.7v and 40w.
I had yellow Samsungs (white sticker) I'd rotate but now they get sucked dry in a day. So, I switched to my NEW yellow LGDBHE41865. Lil' sucker mod (which I really like) is doing it again! I put it in about...