Well you can actually bring two batteries on the plane with you that are larger than 100 watt hours but smaller than 160 watt hours.
Lithium battery bank on plane.
These 160 watt hour batteries must be carried on.
Spare uninstalled lithium ion and lithium metal batteries including power banks and cell phone battery charging cases must be carried in carry on baggage only when a carry on bag is checked at the gate or at planeside all spare lithium batteries and power banks must be removed from the bag and kept with the passenger in the aircraft cabin.
Screwdriver will not be accepted as checked or carry on baggage.
A combination of batteries may be carried e g.
Lithium batteries are more likely to combust and are therefore prohibited for cargo transport as part of air transport regulations.
10 x 98wh lithium ion 2 x 138wh lithium ion 2 x 12v 98wh non spillable 6 x alkaline.
Power banks however use a rechargeable lithium ion battery so the only size limit is the aforementioned 100wh.
For more information see the faa guidance on portable rechargers.
A further explanation is that airlines would prefer handling the risk of lithium batteries in this case power banks inside the passenger aircraft rather than in the baggage compartment.
You may not.
Non rechargeable lithium metal batteries have a 2 gram per battery restriction on airlines.
All other battery restrictions still apply e g.
This crash is a major part of why restrictions on passengers carrying lithium batteries exist and ups now carries this kind of cargo in special fiberglass containers.
Tsa pipeline and security of hazardous materials safety administration describe power banks as un3480 lithium ion batteries thus they must be transported accordingly.
No more than two spare lithium batteries exceeding 100wh and up to 160wh are permitted and forms part of the total carried.
Some passengers don t know if power banks are considered a lithium ion battery or a lithium ion battery contained in equipment.
Bags with non removable lithium batteries power banks or batteries that require a tool to be removed e g.
The only confirmed battery related disaster was a ups plane in 2010 which crashed at dubai international airport after a fire caused by a cargo of lithium batteries.
When travelling with technology it s always better to be informed than to fly clueless.