There are 2 AAs (1,2V * 2500mA, rechargeable) inside.

Where is the danger? Even if I would put the wrong ones inside, from an RC race car (3,7V). I wouldn't even come close to dangerous wattage.

And since when does every device need to be idiot safe? I have a drill, a vacuum cleaner, a saw, a kitchen aid, bottles of isopropanol ... a lot of things are more dangerous.

And the vacuum cleaner the most surprisingly dangerous one, if one of your child decides to vacuum liquids from his rooms floor -- been there: vacuum destroyed, child survived. So, does that mean we only ever are allowed to buy models that can cope with wet and dry?

Oh, please. There's always an opportunity to be more paranoid I guess.