You have to convert * * *. NDS files are converted into * *. Dsq files and * * *. Sav files will be copied to SD card through special conversion software, the former is a game file and the latter is an archive file.
If you consume electricity, it depends on whether you use the boot card or the flash machine when you use SC mini SD. If you use the boot card, it will definitely consume more power, and it depends on how many levels of brightness you turn on. I used to use SCL, and I usually used the boot card for about 7 hours for level 2 brightness.
Of course, headphones are directly plugged in! Brother, can you look for more information before asking?
Incompatible? Theoretically, there will be an updated kernel, which is also related to the origin of your card and the settings when switching. Now you are all using SC one, and the price may be similar to the current SC mini SD. This thing you want to buy now may not be available, or it is second-hand. ............
Instead of getting such a bad one, it is better to buy SC one to support instant archiving and instant raiders. The current price in Shanghai is 165.