import type { BatteryInput, BatteryResult } from './types.js';
/**
 * Calculate battery runtime based on capacity, voltage, and load
 *
 * Formula:
 * - Energy (Wh) = Capacity (Ah) x Voltage (V)
 * - Runtime (h) = Energy (Wh) x Efficiency / Load (W)
 * - Current Draw (A) = Load (W) / Voltage (V)
 *
 * @param input - Battery parameters
 * @returns Battery result with energy and runtime
 * @throws RangeError if capacityAh, voltageV, or loadW is not greater than 0
 */
export declare function batteryRuntime(input: BatteryInput): BatteryResult;
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