Okay - so I just bought a new dive light that uses rechargeables (Barbolight U-15, uses 2 18650s). When I take my next dive trip (August) do I:
1. Put it in my checked baggage and risk some TSA dude inspecting it, opening it up to check the batteries, replacing the batteries backwards, or some other even worse scenario?
2. Put it in my carry-on and suffer through the inspection?