I don't trust those. Being that they're made in China and are always charging, I'd be worried they'd catch fire.
They're UL listed and I haven't had a problem or had even one get warm in the 5 years that I've been using them. The only reason that I replace them is the batteries give out.
Proud Life Member: National Rifle Association, California Rifle & Pistol Association, and the Second Amendment Foundation.
Annual Member: Revolutionary War Veterans Association (Project Appleseed) and the Madison Society.