You did not wake up one morning and decide to run out of energy. You arrived here the way most late diagnosed people do, by spending decades on a budget nobody told you about. The world looked at you and saw a functioning adult, so you assumed the weariness was normal, or lazy, or a character flaw you had not managed to fix. Then the diagnosis arrived and rewired every memory, and suddenly the exhaustion had a shape. This book is about that shape, and about what to do about it, which turns out to be very different from what the productivity industry sells. Autistic energy is not a tidy pile of discrete units. Some days you wake up with enough spoons and lose them all in 2 hours of a meeting. The book takes the spoon theory and builds the fuller picture on top of it: the credit card model where energy is borrowed with interest, the cup that overflows into meltdown and shutdown, the battery that dies at 30% with no warning, and the recovery mode tax that every social event quietly charges. You will build a personal energy ledger, a demand budget, a pacing system, and a low spoon day with 3 settings. You will learn the sensory, social, executive, and masking taxes, the external gauges that work when your internal ones do not, and the difference between burnout and depression. The book treats your nervous system as a legitimate operating system with its own rules, and it never asks you to fix yourself. The goal is not a bottomless battery. The goal is a life you can actually keep.