Just curious if we're on the right path with this. I know there are a few electrical engineers, so any pointers or info would be much appreciated. Someone also

Just curious if we're on the right path with this. I know there are a few electrical engineers, so any pointers or info would be much appreciated. Someone also wrote something in the comments about bypassing a secondary battery and instead using a capacitor to store the power and a resistor to regulate for the input specs of the MacBook. Does this sound viable and more efficient? Thanks.