FA-12313 / Battery state accounting / Member archive

Cycle wear is inferred from net inventory change · case 03

Opposite direction transfers cancel before discharge throughput is counted.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Return discharge throughput units for signed charge deltas; positive means charging, negative discharging. This is the numerator of a discharge-only equivalent-cycle metric.

Why this case matters

An explicit synthetic battery bookkeeping model isolates this state-accounting error; it is not an engineering prediction or safety procedure.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
round trip	`0`	`30`	Failed

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