the charge stays up for along time. It didn?t air dry. The hooks that hold it on the door slip off often and do not allow for my door to close. You can separate the two pars and mount them easily to the bottom of a skateboard or battery powered skateboard as I have to mount two small lights under the skateboard. EDIT: Scientific testing has concluded this bag IS REAL, It does indeed generate UV-C light at a germicidal wavelength at sufficient enough power to disinfect in the 60 seconds stated. Im pleasantly surprised at this bench. Used it outside the front door entrance so that dirt from footwear stays outside the house. I have had some plantar fasciitis issues in the past but none since switching to these sandals. Hopefully the last longer then 6 months which is all I seem to be able to get out of sandals or boots anymore. Muy bonitas en este color, más no en los otros, muy cómodas y ligeras, si tienes el pie delgado pide las Narrow, xq las normales vienen muy anchas