yup and I think it's a lot not just a little current floating. It goes thru the air easily and doesn't have to be touched. And batteries do run down while in the pack just like they do inside the flashlight. Batteries have a shelf life of 5-10 years. Nicola Tesla knew how to have free energy in the air. This isn't used because companies can't monetize it as well, they need it to be something you have to buy, either batteries or electricity that comes into your home thru a wire. If it's in the air how do they charge for it? Maybe require a password like with wifi? So every device would need a little password prompt on it? That might come in the future but up to now it wasn't feasible. This is also why companies are don't use solar power, that is free coming from the sun, a perpetual motion machine for all intents. How to monetize it, can't guard it like an oil field or nuke plant.