Modification of a typical solar path light with a standard 1000ma-hour NiMH AAA cell.
I then replaced the small 4 cell solar panel with a larger 4 cell unit, which produced 150ma in the sun.
Next, I simply changed the 470uH coil on the circuit board to a 22uH coil. The lower inductance increased
the battery current to 40ma when the LED light was on, which translated to about 13ma LED current. The
light was much brighter… [Circuit
designed by David A. Johnson P.E., 05/4/2014]