In Deus Ex: Human Revolution, only your first battery will recharge when having zero energy. So regardless of how many battery packs you have, you'll always need to scarf down energy bars or other nutrients to refill your energy level beyond the first battery. Due to this, I can't see any reason why I would ever want to spend praxis points to upgrade my energy.
What reason is there to upgrade my energy level, or am I correct in thinking it's a waste of points?
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