UGH...only took one drive and 48 hours to go back into battery saver mode. I don't have much fight left.At best, battery voltage only gives a general indication of SOC, not an "accurate" measure.
This from the Workshop Manual may be of interest
"Battery State of Charge The battery monitoring system [monitors] the battery current flow and voltage to determine the battery state of charge. During the drive cycle the battery monitorning system software monitors the charge and discharge current and increases the state of charge during charging, and decreasing it during discharge. During rest periods (key off with no electrical loads) when the vehicle enters sleep mode, the battery voltage is sampled to calibrate the state of charge. The sensor automatically executes this calibration anytime the vehicle enters sleep mode and when the total vehicle current draw is below 400mA. It takes 4 to 6 hours in the sleep mode to calibrate the battery state of charge to high accuracy. If the system draw does not allow the battery state of charge calibration over the previous 7 to 10 days the state of charge quality factor changes to flag this and some battery monitoring system functions, which rely on the accuracy of the battery state of charge, may be temporarily turned off until a calibration takes place.NOTE: Any devices left attached to the power socket that draw in excess of 200mA (or less depending on other battery loads), prevents a battery monitoring sensor from calibrating the battery state of charge."I suggest that your best measure of SOC is that reported by the vehicle PID which your OBDLink MX+ pulls and displays.
Excerpt from noco10 manual for reference (red box highlight added by me)
Could be wrong but I suspect that you've not reached the noco "ongoing maintenance and optimization" mode. Note that the "on and off" of the light for that mode is very slow, with a long interval between the "on / off" lights.
If you did not observe a period of solid green light than I suspet you interrupted the charging process while still in the mode of "optimizing for extended life" which displays a pulsing light.
it can take many hours of uninterrupted charging with no other loads like door-opening (yes, more than 23) for the noco 10 to achieve 100% charge as indicated by a solid green light.
Once at 100% charge, the noco won't enter a cycle of "ongoing maintenance and optimization" (with attendant slow off/on light) until the battery has depleted a bit due to a load (like opening a door) or sitting totally undisturbed for a period of days with only 'sleep mode' loads.
In summary, I don't jump to any conclusion about your battery health. I think it's likely you've not been though all of the time-consuming the steps required to truly fully charge your battery and then assess its health.
Did you happen to look at the battery voltage and SOC with OBDLink when that happened (or later)?
No I didn't have a chance. I took two 20 minute drives this afternoon. Each an hour apart. I check to see if it went into sleep mode and it did again after the first drive, but now when I came back it didn't. I'll be sure to get an SOC if/when it happens again
