/**
 * Battery manager interface
 */
export type BatteryManager = {
    charging: boolean;
    chargingTime: number;
    dischargingTime: number;
    level: number;
};
/**
 * Battery state
 */
export type BatteryState = {
    supported: boolean;
    loading: boolean;
    battery: BatteryManager | null;
};
/**
 * Hook that tracks device battery state
 *
 * @returns Battery state
 *
 * @example
 * ```tsx
 * const { supported, loading, battery } = useBattery();
 *
 * if (!supported) {
 *   return <div>Battery API not supported</div>;
 * }
 *
 * return (
 *   <div>
 *     {loading ? (
 *       <div>Loading battery info...</div>
 *     ) : (
 *       <div>
 *         <p>Level: {Math.round(battery!.level * 100)}%</p>
 *         <p>Charging: {battery!.charging ? 'Yes' : 'No'}</p>
 *         <p>Charging time: {battery!.chargingTime}</p>
 *         <p>Discharging time: {battery!.dischargingTime}</p>
 *       </div>
 *     )}
 *   </div>
 * );
 * ```
 */
export declare function useBattery(): BatteryState;
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