Lately there has been several new tablet devices that use Wacom EMR pen technology. Basically all the pens are the same technology that Samsung is using in their latest Galaxy Note 7 and as well Tab S3.
The latest ones all have 4096 pressure levels, and support tilt. No batteries or sync needed...ever!
Here are a few comparison pictures.
Note the Wacom Pro Pen is NOT compatible with non "wacom" branded products, I included it as comparison. All the tips are replaceable and compatible with others of the same size. The Wacom Bamboo and Samsung S-Pen w Eraser are not compatible with others. The fine tip from the S3/Noris will work in the HP/DELL and vice versa. While they do work I would not recommend them due to offset issues.
IMHO the two best Pen/Stylus is the HP Zbook X2 and the Steadtler Noris Digital.