Many countries are now rolling out changes to how one can fly with lithium and lithium-ion batteries.

For instance, in Japan:

 Effective July 8, 2025 (Japan time), do not store mobile batteries in the overhead bins during flights.  When charging them onboard, always do so in a location where their status can be monitored at all times. Lithium batteries and lithium-ion batteries cannot be accepted as carry-on baggage. Carry-on is permitted only if the following conditions are met  Rechargeable type (lithium-ion battery)

* With a rated watt-hour capacity of 100Wh or less .  Carry-on only. No quantity restrictions. * With a rated capacity exceeding 100Wh but not exceeding 160Wh  Carry-on only. Up to two electronic devices and spare batteries combined. * With a rated capacity exceeding 160 Wh.  Not permitted in the cabin or as checked baggage.

If you’ve got some flights coming up, best to check with your local airline what the policies are with regards to flying with camera batteries. It will be different for each country.