LOVE IT!I love the Pico and so does my wife. Totally agree with 2 bears. Always charge (whenever possible) with external charger. I use LG 3000mah batts. They last over 24 hours so if I pop a fresh charge in before leaving for the day I never worry about running low.
Common tip is to lock the up down buttons (press both for 2 seconds). Since they are on the bottom they can be unknowingly toggled pretty easily.
It's probably one of the best compact 18650 mods on the market for under 30 bucks.
i LOVE IT because o can put a kayfun Monster Mini V3 on the Pico, abd my rig is so Compact if will completely lie lebgthwisw in my pocket.