[chronster]

Yes, putting tape under the battery cover makes it slightly harder to get the battery cover off.

Try this:
1. Have dry hands and a dry phone. No sweaty hands, and no phone that's been handled by sweaty hands.

2. You can take scotch tape and wrap it around backwards around your hand. This gives you a grip on the battery cover.

I ran into this issue and got scared, but now I know how to do it, and when I have no tape, I simply wash my hands and whipe the phone down with a damp paper towel and it's fine (or just rub you hands on your shirt.)

It's just snug, but it'll comeoff.