[cmiles74]

Small watch batteries are an interesting example, I don't recall seeing any warning stickers on these toys or their packaging. Perhaps something is buried in the back of an instruction manual, but that would be obviously ineffective.

[mibbiting]

The more dangerous case is those watch batteries are included in some greetings cards which play music or a recorded message etc. Very young kids can easily chew on a greetings card which isn't going to hurt them, but they may now swallow a battery as well, which may hurt them.

[makomk]

The main line of defence against kids swallowing button batteries is childproof battery compartments on most items that use them.