“As a noob and not knowing any better, I purchased some cheaper batteries prior to this. Actually, kinda scared to leave them alone when charging. This Cartisan Top twist is by far the best one I own. I love the ability to dial in the perfect voltage without having to push a button. It is well made, and I like the way it balances in my hand. It is slightly larger in diameter (14mm) and length, so plan accordingly if you use a stand or wanting to place in a pocket. Loved it so much, I bought an extra.”