A: The 300series battery cannot be replaced by the user or utility. There are several reasons for this:
The meters are sealed to IP68 to prevent damage due to flooded installation pits, rainfall, etc.
Prevents tampering of the meter. To interefere with meter operation, the meter's case must be evidently damaged
Local regulations require meters to be tested every 10 years. The Flownetix 300series is at a cost low enough to be replaced with a new meter every 10 years. Utilities can be offered a bulk return/refurbish service for battery replacement.