Just used Blevo to check internal and range extender battery health. Not too bad. Internal battery lost 11 Wh from rated 320 Wh starting capacity. Range extender lost 6 Wh from 160 Wh rated at start. I don't know if batteries as received were at rated or not. For comparison, my Levo SL reported a starting capacity of 325 Wh. Also for comparison, Mission Control reports both batteries at 100% health. Maybe Specialized wants to discourage any questions about battery degradation for as long as possible. Will be interesting to see when Mission control starts to report less than 100% health.