My Blue Smart IP 67 charger - connected to a 100AH AGM battery using the default settings. If I connect the charger to the battery when the battery is already fully charged (in order to use the maintenance feature), I understand that there is a 30 minute minimum absorption phase. During absorption, I see the battery very quickly charge up to ~14.4 volts and the current drop to almost nothing. After a a few minutes in this 'standard' absorption mode though, the current will drop to zero for maybe 20 seconds at a time while the voltage on the battery drops back to around 14.3 or so before the charger sends a very brief current pulse (looks like several amps). The voltage jumps to 14.6 or 14.7 momentarily then falls back to 14.3 or so before the charger sends another pulse. This continues for the remainder of what I assume is the remaining time in the minimum absorption period. Is this expected behavior? I would think this could be harmful to the battery.