SDL_JoyBatteryEvent

typedef struct SDL_JoyBatteryEvent
{
    SDL_EventType type; /**< SDL_EVENT_JOYSTICK_BATTERY_UPDATED */
    Uint32 reserved;
    Uint64 timestamp;   /**< In nanoseconds, populated using SDL_GetTicksNS() */
    SDL_JoystickID which; /**< The joystick instance id */
    SDL_PowerState state; /**< The joystick battery state */
    int percent;          /**< The joystick battery percent charge remaining */
} SDL_JoyBatteryEvent;