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Wait for: 5v regulators to arrive #solarpi
Wait for good 18650s to arrive #solarpi
Solder up a 5v regulator to the solar cell and USB micro output #solarpi
Wait for the new charge controller to arrive #solarpi
Wait for supercapacitors to arrive #solarpi
Wait for the 4x18650 battery case to arrive to see if it's viable #solarpi
Find a better battery pack that can charge and supply power at the same time #solarpi
Burn your finger on a soldering iron and ruin several 5v regulator boards #solarpi
Charge the 4x18650 pack #solarpi
Discover that the existing power supply sometimes shuts off output and doesn't turn it back on #solarpi
Install supercapacitors #solarpi
Find/purchase a better charging/USB apparatus that can hold 4x 18650s and won't explode #solarpi
Find a viable solar charge controller that can handle 4x18650s #solarpi
Assemble v2 build #solarpi
Work out why it's still randomly turning off and not back on #solarpi
Test cellular on a sunny day #solarpi
It seems to be working?! #solarpi
Solder up supercapacitor USB lead #solarpi
Charge it from the sun with no load, see if that fixes it #solarpi
Looks like a supercapacitor and no battery did the trick (during the day at least) #solarpi