This morning I plot the Cell A of the past week and I see three different battery discharge slope during evening pass over Jakarta (around 14:00 - 16:30 UTC)

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So, to prevent further deterioration of this cell, would it be possible to command “put into Safe Mode if in Eclipsed” ?

THe occurrence of user load towards ened of eclipse causing a crash can occur anywhere on earth for any given orbit season.  But it will always be between midnight and sunrise local time. 

So a version of FOX TLM can watch the battery voltages and if low-v cutout is approaching, then the ground station can "jam the uplink" with some channel activityPTT with incorrect PL to prevent the Xponder from coming up?  Unorthodox but it is in the wee hours locally an will not have much impact on users). ... If it saves the satellite from reset.

Bob