FAA regs about Lithium ion (rechargeable) batteries, I would assume Canada to be similar?
Carry on only, but the quantity limits are actually quite gracious and I know a few folks who regularly fly commercial with several 4S 5Ah (74Wh) RC Lipo bricks.
A 3S 2.2Ah Phantom pack is less than 25Wh labelled capacity.
https://www.faa.gov/about/initiatives/hazmat_safety/more_info/?hazmat=7
Main points:
Size limits: 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. These limits allow for nearly all types of lithium batteries used by the average person in their electronic devices. Passengers may also carry up to two spare larger lithium ion batteries (101-160 watt hours). This size covers the larger after-market extended-life laptop computer batteries and some larger batteries used in professional audio/visual equipment.
Quantity limits: None for most batteries. There is a limit of two spare batteries per person for the larger lithium ion batteries described above (101-160 watt hours per battery).
Batteries must be protected from damage.
Battery terminals (usually the ends) must be protected from short circuit (i.e., the terminals must not come in contact with other metal). Methods include: leaving the batteries in their retail packaging, covering battery terminals with tape, using a battery case, using a battery sleeve in a camera bag, or putting them snugly in a plastic bag or protective pouch.