The fan is doing its job well. Its battery lasts long -it'sa lithium battery and not lead acid as the advert says.It's 25w and not 40w as is in advert. The one thing that I don't like about the fan that needs to be fixed asap is that I cant tilt the fans head towards the ground. So the fan is useless when you're lying on the floor of your house, because the breeze can't get there. The manufacturers need to work on that. Many of us sleep/sit on the floor in our houses and we want our fans to get to us there.