Ipad Pro Not Charging To 100 Percent. The iPad was designed so that after 1000 chargedischarge cycles it will still have 80 of its battery capacity. While the iPad still charges with an iPhone adapter it is a much slower process.
Another reason why you may find your iPhone battery not charging to 100 is because of the battery temperature. If you used 20 of your iPads battery life every day for 5 days and recharged it each day to 100 that would be one charge cycle. The iPad was designed so that after 1000 chargedischarge cycles it will still have 80 of its battery capacity.
Update iOS or iPadOS on your device.
If you used 20 of your iPads battery life every day for 5 days and recharged it each day to 100 that would be one charge cycle. Note that its not considered a charge cycle every time you plug in your iPad. When you overcharge your iPhone or iPad it may generate a lot of heat which is also detrimental to battery health. Close every app and restart your device.