I am working with a system that has a bq2050H designed into a lithium battery pack. The system charges the battery pack using a MAX1758 Li battery charger IC. For most users, the system runs from a DC supply and rarely runs from the battery pack. We are seeing a rapid decrease in the reported RCAC value without the system going on battery or off DC. For example, one unit is reporting around 80% capacity after one month without having been run on battery and always plugged in. The charger is working as expected and battery voltage is around 8.4 V. I have noticed that the CI flag is set, but discharging the battery completely and recharging does not clear the flag. Let me know if you need any further information.