The photos of Scott Mann's injuries are graphic.
Scott Mann was at work last Tuesday when he says the battery exploded, leaving him with third degree burns.
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"I can honestly say this is the worst pain I've ever had in my entire adult life," Mann said.
Mann was burned on his thigh, leg, and hands.
WARNING: The photo below may be difficult to look at.
The 44-year-old general contractor, whose passion is also playing the guitar, considers himself lucky, despite the severity of the incident.
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"If it would have been in my mouth, it probably would have blown out my teeth and possibly my eyes," Mann said.
It will take a few months for Mann to reach the point in his recovery where he can start playing the guitar again.
The FDA warns that you should not overcharge an e-cigarette's battery. The agency says you should also replace the battery if it becomes damaged or wet.