# How to Select a Supercapacitor for Water Meter and Gas Meter Backup
Water meters and gas meters often need low-power backup support for data retention, clock backup and short-time standby functions. A 5.5V coin type supercapacitor can be a practical solution when the design requires compact size and stable backup performance.
## Application requirements
For water meter and gas meter backup, buyers should check rated voltage, capacitance, target backup time, load current and working environment. Because these devices may be installed for long periods, leakage current and reliability are important factors.
## Common capacitance options
0.22F, 0.33F and 0.47F coin type supercapacitors are often discussed for meter backup applications. 1F or 1.5F may be considered if longer backup time is required. The correct model should be selected according to circuit consumption and backup time target.
## PCB and lead type
Meter products often have limited internal space, so diameter, height and lead type must be checked carefully. If you are replacing an original model, the sample photo and datasheet can help speed up model comparison.
## LORIDA support
LORIDA supports 5.5V coin type supercapacitors for water meter backup, gas meter backup, smart meter backup and RTC applications, with sample support and replacement model discussion.
## Need Support?
Looking for a supercapacitor for water meter or gas meter backup? Send your application, backup time and current model. We will help check a suitable option.
