As of 1st January 2025, the IATA rules state that there is no limit on the amount of batteries under 100Wh you can take as a carry on however only a maximum of 2 batteries, between 100wh – 160wh is allowed per person. Any batteries over 160Wh are forbidden as carry-on
on passenger aircraft. Airlines may ask for the MSDS for your batteries, these can be found on the product page themselves. Please also be aware that the airline hold the right to refuse on the day of travel.