A:AnswerA seperate ccharger can be purchased. My Surface laptop though ddoes have the ability to charge it by placing it in the correct location under the base. Its actually pretty slick if you ask me.
A:AnswerCorrect, to charge Surface Slim Pen 2 you need one of the following items:
Surface Pro Signature Keyboard
Surface Laptop Studio
Surface Duo 2 Pen Cover
Surface Slim Pen Charger
Surface Slim Pen 1 USB-C Charging Base