Why Is My Apple Watch Not Charging Properly. I had it charging for 7hrs last night and it only charged 20. Go to apple watch app.

Clean Off Your Charger Apple Watch. Let your device charge for half an hour. There are number of answers to the question Why is my Apple watch not charging before digging into any other solutions make sure you have properly working charging cable and perfectly fine original Apple watch charger.
If you are using a third-party accessory such as a charging stand then it may help to remove your Apple Watch from it and to instead place your Apple Watch directly on the table.
I upgraded my Apple Watch 2 to OS 42 because Apple said I have to as it kept going into swim mode during my workouts and stop counting my calories as kickboxing but instead as swimming. Handle your Apple Watch and accessories safely and always take off your watch before charging it. If there was an issue with your Apple Watch magnetic charging cable try wiping it and the back of your Apple Watch down with a microfiber cloth. Put on charger and see if it charges.

