Charging cable is cracked on iPad Air 2

Any Mfi ( Made for iOS device ) certified USB 2 to Lightning connector cable.

You can purchase Apple's “OK” cables from the Apple Store app/Website or look on Amazon or here below for better quality, braided style cables.

https://eshop.macsales.com/search/?q=USB+to+Lightning+cables

Best of Luck to You!

Any which has the correct port/connectors for your iPad