iPad 11 Pro Power Adapter Compatibility
My iPad Pro came with an 18W USB-C power adapter. Can an older 10W power adapter (model A1357) be used to safely charge the iPad?
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Whilst not recommended, you can use the 10W Power Adapter without damage. Be aware, however, that charging will be very slow; 10W is barely adequate for reliable charging of an iPad.
The supplied 18W Power Adapter is certainly more suitable.