External Power Sensor is the Answer.
With flexible power source, you can connect much larger capacity, rechargeable batteries vs. the 225mAh CR2032 non-rechargeable battery used in regular Wireless Tags. For example, use the 1000mAh rechargeable battery bundle for 4x longer battery life than regular tags. You can connect even larger battery or battery holder for inexpensive AAA batteries.
Or, just plug the USB into wall of your building, or available USB slot on a server machine* to monitor server rooms for "zero maintenance".
If you also connect the rechargeable battery at the same time, built-in battery charger will keep the battery charged, which will immediately work as back up power when the building power fails.
When tag manager is not available (because of building power failure, Internet outage, etc), logged data are stored in non-volatile memory (NVM) unlike regular Wireless Tag Pro which uses SRAM (data is lost when battery is removed). Because of the NVM, data will not be lost when USB or battery is unplugged. Only after the cloud confirms complete and successful data upload and storage, that the logged data in the NVM is erased. Since tag configuration (e.g. logging interval) are also stored in the NVM, upon reconnecting power, logging resumes automatically without configuration from the Tag Manager (which is currently done behind the scene from the cloud for regular tags).
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