Canon EOS REBEL T6i Instruction Manual page 395

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