The Wotofo recurve squonk mod is a great semi mechanical Squonk mod. It uses 18650 to 21700 batteries. It’s very easy to fill and replace the squonk bottle and it’s even easier to put the batteries in. It feels great in your hands and the fire button and bottle is ergonomically placed so it’s very easy to use. I would recommend the Wotofo Recurve Squonk mod and i would highly recommend Eciggity for their excellent pricing and fast shipping.