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ipad air1 supports fast charging, iPad must be type-C eloquence can be fast charging. Even if the 18W charger is supported but you are not fast charging port, it is not possible to achieve fast charging function. Can be used, but can not achieve the fast charge function.
The iPad Air1 has a 10.5-inch retina display with a resolution of 2224 by 1668 and 264ppi. It uses the latest A12 Bionic chip, built-in neural network engine and embedded M12 coprocessor
The iPad air1 can use an 18w charger, and the charging speed will be relatively fast.