Floating Lightbulb

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This is a really cool item. Who wouldn’t want to have this floating in their room?

It will float stably in midair and remain on for years without any physical contact, charging, or batteries. Ironically, with the levitation and wireless power circuitry both on, this entire package still consumes less than half the power of an incandescent bulb.

Source

The site also mentions that this power transfer technology was invented by Tesla and is not used very much. i was just thinking the other day about having something like that in a car where it could power your cordless radar detector (and other items) so we could stop using batteries.

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