Fromt the Wizz Air.com Lithium batteries regulation:
Whether or not a lithium battery can be carried by air depends on its Watt-hour (Wh) rating (for lithium-ion, chargeable batteries) or its lithium content in grams (for lithium-metal, non-chargeable batteries).
When carrying consumer electronic devices (watches, calculating machines, cameras, mobile phones, laptop computers, camcorders, etc.) containing lithium or lithium ion cells or batteries, spare batteries must be individually protected to prevent short circuits (by placement in original retail packaging or by otherwise insulating terminals, e.g. by taping over exposed terminals or placing each battery in a separate plastic bag or protective pouch) and carried in cabin baggage only.
Don’t put spare batteries in your checked-in baggage!
In addition, each installed or spare battery must not exceed the following:
- Lithium metal or lithium alloy batteries cannot contain more than 2 grams of lithium.
- Lithium ion batteries cannot have a watt-hour rating of more than 100 Wh.
Lithium ion batteries exceeding a watt-hour rating of 100 Wh but not exceeding 160 Wh may be carried as spare batteries or in equipment in cabin baggage only, after the approval of Wizz Air.
No more than two (2) individually protected spare batteries with watt-hour rating between 100 and 160Wh may be carried per person.