..
.
├── [ 956] battery_green.png
├── [ 906] battery_light_green.png
├── [ 652] battery_orange.png
├── [ 523] battery_red.png
└── [ 777] battery_yellow.png
0 directories, 5 files
To download all files from a directory, try:
wget -r --no-parent [URL]
That is a shame GitHub limits file size to 100MB.