Canon EOS-1 DX Mark III Advanced User's Manual page 966

Accessories
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). 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.
Caution
Battery Pack LP-E19 is dedicated to Canon products only. Using it with an
incompatible battery charger or product may result in malfunction or accidents for
which Canon cannot be held liable.
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