There are many types of surface pro 4 pen available in market. I have received many emails of surface pro users about surface pro 4 pen battery life. Surface pen comes with 1 year warranty but battery life depends on your use and battery quality. If pen is original then battery will works for 1 year easily but if pen is copy or low quality then you need to change pen battery every month or after 2 months. So i prefer always buy original quality pen to avoid any kind off problem during your work. But the question is how to know pen is original quality or copy.
How To Buy Surface Pro Original Pen
There are many third party supplier that provide surface original accessories Like Surface Docking, Charger, etc. How ever i prefer Microsoft store to buy original Pen and Pen Tip Kit. You can also order it online on Amazon and ebay online store.
Here is some details are provided about surface pro 4 pen, study these instructions before buy surface pro pen.
|Compatibility||Surface StudioSurface LaptopSurface BookSurface Pro1Surface Pro 4Surface Pro 3Surface 3|
|Buttons||Barrel button and tail eraser|
|Weight||.04 lbs (20g)|
|Battery||1 AAAA (included)|
|Warranty||1-year limited hardware warranty|