Minimum 2 years (with correctly specified alkaline cells) Battery low warning :
Display indicates when battery power reserve is low. Unit will continue to function for a
minimum of 4 weeks after the first indication is given Battery replacement :
Configuration settings stored in NVRAM, so are retained during battery replacement
METRICS Dimensions : 90 x 92 x 27mm (thermostat) : 90 x 92 x 30.5 mm
(relay box : 157 x 115 x 105 mm (pack) Weights : 154g (thermostat with batteries) : 96g
(relay box) : 380g (pack)
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