Ring can be hardwired to your existing doorbell’s electrical leads, but lacking any doorbell at all, I opted to use the device’s internal battery, which is charged with a USB cable (just like any typical mobile device), and is rated to last one year between charges. Pulling off the doorbell for recharging is a simple matter of removing two screws with a special tool that Ring provides, and then sliding the doorbell off a backing plate. It’s no big deal.
2 - This kind of goes along with #2. You cannot access the doorbell with security software like Blue Iris,et.al. Now, I get that they want to sell you their Cloud service and I'm ok with $30 / year to have an off-site backup. But if you could link the doorbell into your security system you would have an actual video of everything in your possession and you could access it from any computer in the world. That would be REALLY handy for police investigations and any legal hassles that may come your way.