Follow along with the video below to see how to install our site as a web app on your home screen.
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It won't charge much on just USB as it's such a meaty battery, it does say that in the manual. You're best to charge it over night.
Check inside the tablet connector and make sure there is nothing blocking the contacts, blow on it and brush it out with a tooth brush, make sure it is clean. If that doesn't fix it ... it may need to go back.