As the news has spread across the net, the new american TSA guidelines on what you are allowed to have in your check in luggage and what is allowed to be carried onto a plane have been changed to affect batteries now.

The choice reading can be found here.

Now, you are limited by the amount of active component in your battery (thankfully there aren’t any devices that use batteries of this size in the consumer market) and also you are no longer allowed to have spare batteries in your check in luggage (these have to be placed into your carry on luggage now). However, the original battery is allowed to be left in the device they are for, and that device is allowed to be left in your check in luggage.

What is the difference? Why is it ok to have a battery in your device and then leave the whole thing in your luggage but not a spare one??
Surely the battery left in a device is more likely to actually burst into flames (provided it’s of a faulty batch that has this kinda reaction) than if it was just on its own?

I’ve heard some people talk about spare batteries being loose and somehow shorting themselves on the handy strips of metal that everyone ensures they pack into their luggage, but surely something like this would have happened already. Or are batteries being fabricated to become more lethal now adays?

Yet another stupidly thought out rule by these fools.. it’s almost like they are trying their hardest to dissuade people from using air travel!