A:
I have the rugged folio case and it took about 3 hours to charge initially. The literature says normal charge time is 2-4 hours.
There are indicators for the remaining battery life. You can push the battery button and it will either flash green, yellow, or red depending on the remaining battery life. I have been using mine regularly for approximately 2 months and the battery indicator is green.
The literature says you can use the keyboard for up to two years on a charge. That is long time but based on my use I think it will last several months at least.