Canon EOS 77D Mode D'emploi De Base page 175

Use of Genuine Canon Accessories Is Recommended
This product is designed to achieve optimum performance when used with
genuine Canon accessories. Therefore, using this product with genuine
accessories is highly recommended.
Canon shall not be liable for any damage to this product and/or accidents such
as malfunction, fire, etc., caused by the failure of non-genuine Canon
accessories (e.g., a leakage and/or explosion of a battery pack). Please note
that repairs arising out of the malfunction of non-genuine accessories will not
be covered by the warranty for repairs, although you may request such repairs
on a chargeable basis.
173