The <a href="https://www.sammobile.com/tag/galaxy-note-4/">Galaxy Note 4</a> has a 3,220 mAh removable battery and the best part about having a device with removable battery is that you can swap a died battery with a fully charged one within no time. Even though the inbuilt battery is quite capable of surviving the Note 4 for at least a day, you might want to have a look at the official extra battery kit from Samsung if you are someone who puts your smartphone through heavy usage. You can buy the official extra battery kit fo best offer.<br><br><img src="//gdetail.image-gmkt.com/180/638/731638180/2017/2/e5352b74-3a01-44ab-8726-0adf936177e0.jpg" width="940" height="919">