Flying with batteries
Airlines have been tightening up their rules for flying with lithium batteries in recent years, so check the specific restrictions of domestic flights as well as international flights on a shoot, although in genereal batteries with more than 100Wh or 12V power are banned. Some Brazilian airlines will allow lithium batteries of up to 100Wh to be carried on board, but generally only two per passenger, which is rarely enough when the crew to equipment ratio is high. Some airlines ignore their own rules, but it's not worth taking the risk, so we tend to rent batteries from local providers in the Amazon and can get a good price through our local fixers.