Battery Holder with Magnets for Wireless Sensors with Sigfox Network Output (Wx8xx Series)
The Comet SP015M is a battery holder designed to be used as an accessory for battery powered transducers with radio output to Sigfox net (Wx8xx series). It allows you to power the transducer from one or two 3.6V lithium size C batteries, extending the operating time up to six times compared to the standard life of the internal AA battery.
The SP015M battery holder is supplied without batteries; batteries are sold separately. Comet recommends using Tadiran SL2770/S batteries. One or two batteries can be fitted. If using two batteries, always use the same type, manufacturer, and age.
Please see the table below for battery life estimates at operating temperatures up to +35°C:
| Sending Interval | 10min | 20min | 30min | 1h | 3h | 6h | 12h | 24h |
| 1 Battery | 1 yr. | 2 yrs. | 3 yrs. | 5 yrs. | 10 yrs. | > 10 | > 10 | > 10 |
| 2 Batteries | 2 yrs. | 4 yrs. | 6 yrs. | 10 yrs. | > 10 | > 10 | > 10 | > 10 |
Use two batteries only in applications where the transducer will be set to shorter sending intervals (from 10 min to 1 h). For long sending intervals (3 h or longer), you can achieve a life of 10 years or more at normal operating temperatures, even with one battery. Battery life of more than 10 years is rather theoretical, because at such a long time the effect of batteries self-discharge may be higher than the power consumption of the device.
At continuous operating temperatures above 35 °C, the battery life may drop by a third or half. In accordance with the transducer manual, the battery life values apply when extraordinary alarm messages are not used or only exceptionally.