Yep, lithium ion battery pack.
Do you need a plane adapter still these days?
it depends on the plane model, if it's the newer ones than they should have te 3.5 jack but the older ones don't. If you know what flight you are flying with you could google it or I could ask a friend for you as she works for BA.
@ExTra started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Yep, lithium ion battery pack.
Do you need a plane adapter still these days?