This google sheet shows the approximate amount of time it takes to get most power cells in the game. This is useful for routing (mostly No LTS and NMS), or to just have an idea for the ideal time of each one. https://docs.google.com/spreadsheets/d/1PLfaarseaoV5x1_DlNGUFKJHDa9sEiignuhXmAeyHR4/edit#gid=0