Hi Paul, I am a fellow drone pilot like yourself. I found this straight from the guidelines: Spare Lithium Batteries: Spare (uninstalled) lithium-ion and lithium metal batteries must be carried in carry-on baggage only. When a carry-on bag is checked at the gate or at planeside, all spare lithium batteries must be removed from the bag and kept with the customer in the aircraft cabin. Spare batteries must be protected from damage and short circuit (i.e., the terminals must not come in contact with other metal). Protection methods include: leaving the batteries in their retail packaging, covering battery terminals with electrical tape, using a battery case, using a battery sleeve/pocket in a camera bag, or putting them snugly in a plastic bag or protective pouch. Size Limits for Lithium Batteries: Each installed or spare lithium battery must not exceed the following: Lithium metal (non-rechargeable) batteries are limited to 2 grams of lithium per battery. Lithium-ion (rechargeable) batteries are limited to a rating of 100 watt hours (Wh) per battery (2 maximum). NOTE: Batteries with more than 160 watt-hours are forbidden in air travel For further information, please visit: faa.gov(opens new tab) If you are unsure whether the item you wish to pack in your luggage, carry on, or on your person is hazardous, please contact an Allegiant representative.
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