I admit that the press and people who do not know much about batteries have tended to get this wrong. However with the numerous devices I carry/pack I usually have at least a dozen spare AA's and AAA's for quick recharges, swap outs, etc.

I can see this slowing down my passage as the TSA checks to ensure that all my batteries do not contain lithium.

Note however the link specifically mentions:
spare Lithium-Ion and lithium metal batteries are forbidden in checked luggage
Lithium Metal Battery w/ over 2 grams of lithium, (this would be like the size of two of the 160 watt hour lithium ion camera packs they picture on the TSA link) are totally forbidden - even for carry on.

Now please, someone do the math - at moderate usage how long could I operate my N810 on 300 watt hours of battery?