Trying to think something that wasn’t fun from my last trip, I remembered our return flight from Tokyo-Japan to Athens-Greece (via Istanbul-Turkey ). Having been late for the check-in process, and boarding the last flight (before Narita airport closing for the day), we were informed that our flight would depart sooner than scheduled! Rushing the check-in , we proceeded to the control section. We were three wheelchairs; the first passed, the second passed, and when my turn came the trouble begun! For some reason, while my wheelchair was identical to the previously passed one, I was not allowed to pass. The only difference between the two wheelchairs was that the first had AGM batteries , the second one GEL ones. They wouldn’t say to us what the problem was, the plane should take off, and we didn’t know what to do! In the end, after many negotiations I was left to board though. If I understood correct the problem was with the ecological regulations of the country and the fact that they could not check directly the batteries. Either way, it would be good for all of us who use power wheelchairs to always carry with us a certificate of the batteries I guess, so to be able to prove their type etc.