Are there any restrictions on the carriage of items powered by lithium batteries?

PORTABLE ELECTRONIC DEVICES (PED) CONTAINING LITHIUM METAL OR LITHIUM ION CELLS OR BATTERIES
There is a limit of 15 items per passenger when carried by passengers for personal use items include, medical devices such as portable oxygen concentrators (POC) and consumer electronics such as cameras, mobile phones, laptops and tablets etc.
For lithium metal batteries the lithium metal content must not exceed 100 Watt Hours.
Devices in hold baggage must be completely switched off and must be protected from damage.
Baggage equipped with a lithium battery, other than lithium button cells, the battery must be removable. If offered as hold luggage the battery must be removed and carried in the cabin.

ITEMS WITH A WATT HOUR RATING EXCEEDING 100 BUT NOT EXCEEDING 160 & SPARE OR LOOSE BATTERIES
For portable medical electronic devices only, lithium metal content exceeding 2g but not exceeding 8g. Devices in hold baggage must be completely switched off and protected from damage.
You will need approval to carry these items on the aircraft, please contact our please contact our Customer Care team 48 hours prior to departure to advise of the items.
Maximum of two spare or loose batteries in cabin baggage only. These batteries must be individually protected to prevent short circuits.