Seems to be you can carry max 15 devices with built-in 100Wh battery and 20 extra 100Wh batteries. Larger batteries require approval. https://www.iata.org/what

Seems to be you can carry max 15 devices with built-in 100Wh battery and 20 extra 100Wh batteries. Larger batteries require approval. https://www.iata.org/whatwedo/cargo/dgr/Documents/passenger-lithium-battery.pdf https://www.iata.org/whatwedo/cargo/dgr/Documents/passenger-... Btw, newer Lenovo T4x0 models have a very nice dual-battery configuration, which allows you to swap the battery without shutting down.