None have multi week battery life. All the ones that do sleep stages are equal in sleep tracking. I think Charge 3 has the best battery life. Again, I don't spe

None have multi week battery life. All the ones that do sleep stages are equal in sleep tracking. I think Charge 3 has the best battery life. Again, I don't speak for Fitbit. But this page does: https://www.fitbit.com/campaign/compare https://www.fitbit.com/campaign/compare