I’ve had this for about a month and haven’t had to recharge it yet. I only spend about a minute each time but that is all I require. Does a good job. Plenty of force.
I had an old one with the hose and it was a pain to use. I love this one. It holds just enough water and holds a charge for quite a while. I read reviews on other waterpik units that are tricky to charge but this one is easy. You don't need to worry about the overcharging that others complained about.