This water meter application compares the use of a battery system and a battery and supercapacitor combination for smart metering. In the battery-only system with a one-time daily transmission, 20% extra of the total capacity will be consumed by the pulses. On the other hand, supercapacitors provide current pulses and a fast reaction but can consume up to 2 µA. Overall, these supercapacitors consume about 10% of the total capacity of the system over the life of the meter. The cost and benefit of both solutions are equivalent of one time per day transmission pulse. If more than one time per day is needed or if there are low temperatures, then it is better to use supercapacitors. If it is less than one time per day, it is better to use battery only.