BEWARE!There are cheap copies of these flashlights out there!!!
I saw the above post here, and went out to ebay to find a few for around the house & cars. I ordered two and received them in about 5 days.
Let me first say that I work on/with/in electronics, and have for the last 27+ years. I do my own designing of some stuff, and repair some of the "State of the Art" stuff in the automotive/computer/instrument field(s) on a
daily basis.
The copy "Shaker" flashlight
DID NOT, WOULD NOT & COULD NOT "Recharge" it's batteries in any way, shape, or form.
It was, for all intents and purposes, a simple battery powered (LED) flash light.
It had some stuff that at a quick glance would look like it "Might" recharge itself, but on a closer look, I could see that it was just "Window dressing".
In order for these lights to "Charge", they must move a magnet through a coil of wire. This will generate a voltage, that is then available to be used (With some simple circuitry) to "Charge" the battery (Or Capacitor).
This light had a piece of totally un-magnetized metal (for the "Magnet"), a poorly wound coil of wire (the coil), and absolutely no connection to the battery, no circuitry, no possible way for this thing to do what it was supposed to be able to do.
I got my money & shipping back, but like I said....BEWARE!!
Tall Shadow