My mobile 1 died, and I would like to get a 2. Will my batteries and mounts work with the 2?

Hi there, I'm sorry to know about what happen to your Osmo mobile 1. For the battery, unfortunately, it is not possible since the Osmo mobile 2  has a different type of battery. Most Osmo accessories are not compatible with the Osmo Mobile 2. However, Osmo Tripod is compatible with the Osmo Mobile 2 and can be mounted to it via a newly installed mounting hole at the bottom of the gimbal. If you have other concern, please feel free to contact us. Thanks for your support.

Nah, the Osmo Mobile 2 have build-in battery that you could not change, but it have 13hr of battery life

The mount probably but the batteries wont. You can't change the osmo mobile 2 battery.