Note 9 Stylus Pen (WithBluetooth) Replacement for Samsung Galaxy Note 9 N960 All Versions Stylus Touch S Pen with Tips/Nibs (Blue)

How long does it stay charged after using for less than 5-10 minutes it says charge pen just making sure thats normal & I don't need to replace again?

ive ordered a couple different pens and the tip has either been hard plastic or a firm rubber. i perfer the rubber tip. is this pens tip rubber?

Will this work for my s 21 ultra?

Does this replacement takes pictures if I press the button on the pin?