Absolutely right, don't know why I types amps, it should be watts. That isn't the charger on the link BTW; close but not quite; the one I have contains an amorphous solar cell. That's most likely a polycrystalline cheapo which is the k-car of solar cells. It was made by Sun Force (bought it ~2004). Dunno about the "blue planet" stuff. Seems to be a lot of new "green" companies sprouting up. Amorphous cells suddenly became expensive when someone figured out they can maintain their output at high and low temperatures...and that's what you find in the new flexible "solar" roof shingles.
As for
no diodes, no one in their right mind would market that kind of fire hazard....then again you can buy the duracell brand AA batteries at the dollar store now...the ones with the pink energizer bunny on the packaging
More likely, it's a tiny surface-mount "bead" diode from our favourite off-shore counterfeiter that wouldn't last long under a constant push from an alternator. I've had mine apart to mount it without the bottom plastic and its diode is a good old-fashioned zener and resistor package.
Andy