They were fully charged by the time I checked them a few hours later. I counted to 9 seconds when BOTH actually worked and it takes me about 40 minutes to mow. They are very lightweight and supportive. This is a great phone charger. they didnt like to stay in my ears, they were very hard to slip in and stay. I bought this pair of earbud last year. The DPI can be increased to up to 16,000, but I dont think most people will need to go much beyond 2000. For reference I am short female 198 lbs, 32 inch waist and I purchased a Medium using the second clasp, again it fits really well. I will buy these slippers again when the first ones wear out. Oh, and by the by, I wear them mostly around the house and taking the trash out to the curb, but even after a trip to Bass Pro and a couple of trips to the grocery store they still look and feel brand new and Im normally tough on shoes.