What type of charger does a Nintendo Switch use?
The Nintendo Switch uses a USB C charging cable
yes Yes you can, but I would use a charger that has an amp switch, so you can use the lowest amperage there is on the charger...like 2 amps at the most, mine has a 10/2 switch on the charger..I would only use 10 amp for a VERY short time, and if you can keep an eye on it, then switch it to 2 amps...most motorcycle batteries can be done this way..
How do you charge a Nintendo DS whithout the regular charger and without a Game Boy Advance SP charger?
If you are not using an official DS charger, I recommend discontinuing its use. This has happened to me when I tried to connect the wrong number and type of AA batteries to my DS. If you are using an official DS charger, it might be intermittent or broken, or the battery might be fully charged or dead.
No. While Nintendo manufactures AC adapters ('chargers') for both 230v and 110v locales, each charger works with only one voltage. For example, the USG-002(UKV) charger, supplied with DS Lites in the United Kingdom, only works with 230V. To use your Nintendo DS in a place with a different mains voltage from where you bought it, you'd need to buy another charger.
You can charge the Nintendo DS with a Game Boy Advance SP charger (& vice versa) if you have the original version of the DS, the 'Phat' version. Otherwise, the DS Lite, DSi, and 3DS all have their own unique chargers. Each one is different, so you'll need a separate charger for each. (unless you buy an unofficial charger with lots of ends)