The Mechanical Colibri Stone with electronic board takes maximum power from the battery with no harm to button. Also, the board has special overdischarging and reverse polarity protection. For 18350 battery.
Height: 47,5 mm Diameter: 22 mm Weight: 52,3 gr Material: stainless steel and natural acrylic stone Color: Blue/Brown/Red Velvet - new! Price:€94