B737-900
Flight Attendant Current
Other / Unknown; Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Hazardous Material Violation; Flight Deck / Cabin / Aircraft Event Passenger Misconduct
Aircraft Equipment Problem Dissipated; Flight Crew Overcame Equipment Problem; General Maintenance Action
Company Policy; Chart Or Publication; Procedure
Passenger in 31A had a single wheel balancing board under 160[Wh] lithium battery. One section in our manual states it's good to go under 160[Wh]; however under the Dangerous Good section it states single wheel balancing device (eg; hoverboards) are prohibited. The Gate Agent; their Supervisor; and whomever answered the phone for [company] said it was allowed. We took the passenger and board. Good idea to have approved sticker!!!
During boarding a passenger came on with a one wheel pint (similar to hoverboard). We were not sure if this was prohibited. The passenger said they had called ahead and was told since the non removable lithium battery was less than 160 [Wh] it was allowed as a carry on. They also had already flown from ZZZ1 to ZZZ with it. They also told me their brother had flown earlier this year with one; no problem. In our flight attendant manual section 6.500 page 7 it does seem to be allowable if stowed overhead; which we did. After take off and upon further review of the manual we discovered in section 6.500 page 4 self-balancing devices (e.g. hoverboards) are prohibited.  We continued on to ZZZ1 landing safely without incident. It would be nice to have this clarified. The customer suggested a certificate of approval.  Clarification and certificates of approval for questionable devices.
B-737-900 Flight Attendant crew reported a communications breakdown between Flight Attendant crew and Customer Service Agent; Captain; Company SOP's/ Manuals regarding the air carrier's policy of transporting Lithium-Ion powered Hoverboards in passenger cabin.