Added SDL_JoystickCurrentPowerLevel() to WhatsNew.txt for 2.0.4.
diff --git a/WhatsNew.txt b/WhatsNew.txt
index 07b563e..79a6ae9 100644
--- a/WhatsNew.txt
+++ b/WhatsNew.txt
@@ -33,6 +33,7 @@ General:
* Renamed SDL_assert_data to SDL_AssertData and SDL_assert_state to SDL_AssertState
* Added a hint SDL_HINT_WINDOW_FRAME_USABLE_WHILE_CURSOR_HIDDEN to prevent window interaction while cursor is hidden
* Added SDL_GetDisplayDPI() to get the DPI information for a display
+* Added SDL_JoystickCurrentPowerLevel() to get the battery level of a joystick
Windows:
* Added support for Windows Phone 8.1