Originally Posted by squeakr

So I purchased an electronic flyswatter to bring with me to Alaska. However when it arrived it was way too large for me to consider using so I contacted Amazon to return it. It's powered by recharging through USB cable or plugging the USB socket into an adapter and then plugging it into the wall.
when I contacted Amazon they told me that because it has a lithium-ion battery I shouldn't return it but instead just dispose of it however I like. I never thought twice about carrying something like that plus a similarly powered handheld fan in my carry-on. Is this going to be a problem?