It will still beep. It has an internal capacitor or something to hold a bit of power to make it beep when power is low or cut off. Mine used to even beep when the battery was disconnected but the trailer was plugged into shore power.
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2007/21 TM 3326 (Pride of the Fleet)
2000 2720SL (Rebuild Project)
2002 2619 (Parts TM)
SMARTER THAN GOOGLE!
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