The VSEW_mk2 is always on. However, when not in operation it only measures time, which only takes a tiny operating current. In that Idle state it can stay on for up to 6 months. When the VSEW_mk2 is actively measuring, its power consumption is mostly affected by two factors:

 

The VSEW_mk2 can be configured to connect to a server at regular intervals. When that function is enabled, the VSEW_mk2 will activate its WiFi™ interface at the defined interval, and attempt to connect via WiFi™ for up to 1 minute. During that time, the instrument’s power consumption will be increased. If the connection fails the VSEW_mk2 will fall back to its previous state (Sleep or Recording).

Note:        WiFi™ communications consume battery, so when leaving the VSEW_mk2 unused for a long time, it is important to disable the WiFi™ periodic connection feature.

In order to minimize the power consumption due to WiFi™ reporting, choose a longer WiFi™ connection interval, for instance 1 hour. Make sure that the router is well within range of the instrument. WiFi™ consumption is greatly increased when the WiFi™signal is weak.

The Instrument_Manager application automatically calculates and displays the cumulative number of days that the battery would last while recording, as a function of the instrument settings.

Note:        That indication does not take into account any WiFi™ reporting.

In applications where the VSEW_mk2 must record for longer periods of time, it can be connected to a USB charger. For outdoor-use, a USB-output solar panel, such as the one found in https://convergenceinstruments.com/product/data-logger-accessories-solar-pannel/ is an ideal solution that will power the instrument indefinitely.