import type { StateOfHealthInput, StateOfHealthResult } from './types.js';
/**
 * Calculate battery State of Health (SOH)
 *
 * @formula SOH% = (measured / rated) × 100
 * @reference IEEE 1188, IEC 62620
 * @param input - Measured and rated capacity
 * @returns SOH percentage and degradation status
 */
export declare function stateOfHealth(input: StateOfHealthInput): StateOfHealthResult;
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