This whisk has WAY more power than my old AA-battery-operated frother! I love extra thick foam on my iced lattes, and I make 2 a day, so I was going thru 2 batteries about every 3 weeks, while the frother was losing power with each passing day until it couldn’t froth the half-and-half. It took 3 minutes per drink to get the super thick onsistency I like, and I had to hold the power button down the whole time, which made my hand cramp. The foam was worth it—just barely. But this little guy is so easy and comfortable to use, and it makes thick, rich foam in under a minute. And it doesn’t lose its amazingly high speed over time as the battery is losing its charge. I charge it up about once a week, even though it still has a charge. I love this whisk and give it my highest recommendation!