(CNet)Charging up your hoverboard? Keep a fire extinguisher near by.
That's one piece of advice from the US Consumer Product Safety Commission in an update Wednesday to its investigation of the self-balancing boards. It also suggests wearing protective gear, staying off roads and charging the boards away from combustible materials.
The federal regulatory agency is now investigating 39 hoverboard fires across 19 states, said CPSC spokesman Scott Wolfson, up from 12 incidents reported in December.
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