Smartphone: ZTE Obsidian Z820
Problem: Battery is Not Problem
Description: my ZTE Obsidian Z820 cellphone suddenly shut off while
I was watching a video, and nothing has revived it. The battery is not
the problem, because the battery works fine in my brother’s Obsidian
and his battery does not revive my Obsidian. The charging LED does not
light up when the phone is connected to chargers or USB ports.