Thermostat batteries drain very quickly (weeks instead of months).

Safety first: Use only recommended battery types.

Steps:

• 1. Use quality batteries: Fit fresh, branded alkaline batteries of the correct size.
• 2. Optimise settings: Reduce backlight timeout and brightness. Disable unnecessary features like constant occupancy detection if not needed.
• 3. Improve RF signal: Move the RF receiver closer or reduce obstacles to minimise retransmissions.
• 4. Check for heat: If the thermostat feels warm on batteries alone, an internal fault may be causing high current draw; replace the unit.