SDL_GetJoystickPowerInfo - Get the battery state of a joystick.

       This function is available since SDL 3.2.0.

Simple Directmedia Layer                           SDL 3.2.20                        SDL_GetJoystickPowerInfo(3)

       You  should  never  take a battery status as absolute truth. Batteries (especially failing batteries) are
       delicate hardware, and the values reported here are best estimates based on what that  hardware  reports.
       It's  not  uncommon  for  older batteries to lose stored power much faster than it reports, or completely
       drain when reporting it has 20 percent left, etc.

joystick
              the joystick to query.

       percent
              a pointer filled in with the percentage of battery life left,  between  0  and  100,  or  NULL  to
              ignore. This will be filled in with -1 we can't determine a value or there is no battery.

       SDL_GetJoystickPowerInfo - Get the battery state of a joystick.

       Returns  the  current  battery  state  or  SDL_POWERSTATE_ERROR  on failure; call SDL_GetError() for more
       information.

#include<SDL3/SDL_joystick.h>SDL_PowerStateSDL_GetJoystickPowerInfo(SDL_Joystick*joystick,int*percent);