Why is my battery life

Why is my Samsung galaxy note 3 battery from 80% suddenly dropped to 0% n turned off itself (just been fully charged n surf Internet only 10 min. Didn't receive 15% auto warning n 5% auto warning message). I immediate changing my phone again and it showed me battery 80% .
Looks like my phone has wrongly detected actual battery % n thought battery 0% n turned it off.

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by stevie57
2 hours ago
Last post by mayert.bo
2 hours ago
Last post by adriel75
3 hours ago
Last post by pagac.rashawn
42 minutes ago