Not only was this tutorial extremely helpful, a youtube video showing how to open a tablet with fingernails shows the design philosophy of impenetrable Apple products to Google's easy access. I was amazed how easy it was to pry open a corner and work a plastic pen clip along the cover to unsnap it. Two years of steady use appears to wear out the battery so a replacement is already on order.

Finding this online site is a welcome reprieve from guessing how to repair things. Thank you for providing a way to present difficult issues in easy to read/understand format.