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Why disconnect something that might save your life one day. I am sure that the Cessna design engineers would not have put this system into the 337 without going through all the pros and cons.
The Alt restart system provides a voltage to the field of both alternators to excite the field and get them back on line. Once you have let go of that button the restart batteries are disconnected from the field and no longer suppling a field voltage as the alternators are now on line the battery contactor now come on and the battery will charge at a rate that the regulators will allow and the battery can take. Remember the battery is a lead acid battery and will take a lot of punishment to short out plates etc.
This CFI who said press the Alt Restart Button when the Inop lights come on at low RPM, should quite honestly either read the POH or go for retraining on the airplane he is allow to operate in.
If you run the battery down during taxi or holding at low RPM, does that not show you are not monitoring the systems and adjusting to maintain the serviceability of those system, common pilot practice!
You have got a lot of if's in this and when it comes down it, has anyone on this group had trouble with the ALT Restart? If the system is check out first flight of the day and the batteries are replaced IAW the service manual, wheres the problem?
BTW we always set the idle on the 337 to 900-1000 rpm. This solved a lot of problems, if you set them to 600 rpm the fuel flow settings and cooling are affected.
Would be interested to read your comments
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