score:14
I have the exact same device, have travelled with it multiple times in carry-on baggage, and never had anyone pay it any attention.
Battery-operated devices of any kind are never a problem with carry-on luggage (with the exception of those with extremely large rechargeable batteries, which obviously isn't the case here).
Razors/shavers/etc can be a concern due to sharp edges/blades/etc, however this particular device does not have a exposed blade, and is definitely not 'sharp' in any sense of the word. If you do travel with the razor-style head for it, this would be considered a "disposable razor" which is allowed in carry-on bags the world over.
So yes, you can travel with this in either your carry-on or checked-in luggage.
Personally I generally place a small piece of paper covering the terminal of the battery before travelling, and then remove it when I arrive. This removes any possibility of the device turning on during travel.
Upvote:1
Restrictions on batteries are specific to Lithium batteries. They must be carry on.
FAA maintains a list of events related to Lithium Batteries. Some of them involve passengers incorrectly checking in their devices with Lithium batteries, resulting in fires. A general summary of these events can be accessed here.
One of the more serious event was the crash of UPS cargo plane caused by a large shipment of Lithium Batteries self-igniting. Due to the nature of the fire, standard fire-fighting techniques such as decompressing the cargo bay did not contain the fire because the batteries provide its own oxygen. The fire can actually burn in a vacuum.
Electrical Engineering SE also has a great post on detailing the dangers of Lithium batteries.
Upvote:6
Restrictions on batteries are generally imposed to keep the batteries out of the luggage hold. Depending on the type and capacity of the battery, and in whether the battery is installed in its device or carried as a spare, they are either allowed in both checked and carry-on luggage, prohibited entirely, or allowed in carry-on luggage only.
You haven't given details about the battery in your device, but as far as battery restrictions are concerned, it is almost certainly small enough to be acceptable. With respect to restrictions on sharp objects, electric shavers and trimmers are permitted. You should have no trouble with this device.
However, rules may vary from one country to another and from one airline to another, so be sure to check the rules that apply to your flight.