After the automatic charge limit stopped working quite some time ago, I've discovered that by manually charging to 80% all the time, the battery's internal cells become quite unbalanced. You notice this when you check battery level straight after a ride, and again about 2 hours after the ride. The battery level 2 hours later has dropped about 5%, presumably as the internal cells 'level out'. The reverse happens when you charge to 80%. 2 hours after you stop charging, level has risen by about 5%. So now I've reverted to charging the battery FULLY (charger turns itself off) before a ride. After the ride the battery level stays constant now.
The Charge Limit feature was supposed to force a 100% charge every 10 recharges to balance the cells, but I don't think this is frequent enough. I haven't experimented to find how often a full charge is required to keep the battery cells balanced, but for sure it must be done more often than 1 in 10 charges.
Perhaps this is why Specialized has gone quiet on fixing the Charge Limit failure problem....the battery requires more frequent full charges, and they haven't figured it out yet.