Are Cell Phone Batteries Dangerous. I ignored at intial stage and the battery continued to swell beyond the back plastic panel. So I assume from the fairly strict warnings that come with these products that yes it is unsafe to replace a mobile devices original battery with one made by a third-party manufacturer.

A swollen battery is a major inconvenience and a potential health hazard. In fact these batteries are used in two billion consumer devices every year. That is very dangerous.
An Overheating Cell Phone Battery.
Mobile phone users now face a new danger. Only buy batteries from a reputable manufacturer or supplier. Up to 2 cash back Cell phone batteries contain highly toxic and dangerous chemicals. That is very dangerous.
