delta and american airlines banning hoverboards - lithium ion polymer battery

There may be hoverboards on your holiday wish list, but at least two airlines are now stopping them.
Delta has banned these popular devices from flying since December.
American Airlines will ban them from Saturday.
Southwest Airlines told ABC News that they are reviewing their policies, but so far the airline has allowed them as long as the battery size meets the requirements (the lithium-
Lithium-ion or lithium-polymer batteries cannot exceed 160 wattshours).
Delta said it would ban
Balance personal transport equipment in carry-on
Luggage and checked baggage.
They say "the label is not good . "
Ion batteries that power them-
Frequent flights exceeding government restrictions-
There are security risks.
Delta reviewed the hovercraft product specifications and found that the manufacturer did not consistently provide details on the size or power of lithium
The company said in a statement.
"While this is not common, these batteries can overheat spontaneously and pose a fire hazard," the airline said . ".
Instead of specifying the model or manufacturer, the company prohibits all "balance vests, hoverboards and self-contained
Any type of balance plate using lithium or lithium-ion batteries.
"Jet Blue and United airlines do not accept hoverboards
On or checked baggage.