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lipo - Do cell phone batteries contain protection circuits? - Electrical Engineering Stack Exchange
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![DIY 3.7v Battery protection Module (from old mobile batteries) [E9] - YouTube](https://i.ytimg.com/vi/9jEx2TwG9I0/maxresdefault.jpg "DIY 3.7v Battery protection Module (from old mobile batteries) [E9] - YouTube")
DIY 3.7v Battery protection Module (from old mobile batteries) [E9] - YouTube
lipo - Do cell phone batteries contain protection circuits? - Electrical Engineering Stack Exchange
