The VSEW_mk2 has four modes of operation:

Mode

Operation

Power Consumption

Idle

Disconnected from USB and not actively recording - Only keeps time.

Minimal: Only needs to be recharged every 6 months.

Active

Connected to USB – Not recording – Instrument is fully on and measuring

Instrument draws power from USB to power itself, and if necessary recharge its battery. Battery is not depleted.

Recording or Auto-Rec

USB-connected or not - Fully on and recording.

If USB-connected, power comes from USB. If not, power comes from the internal battery. Power consumption depends on the instrument settings, and can go from days to months.

Periodic WiFi™ Connect

From any state, including Idle and Recording, the instrument can periodically wake up its WiFi™ interface and attempt to connect to a server. If the connection is not established after 1 minute it falls back to its original state until the next connection time.

If USB-connected, power comes from USB. If not, power comes from the battery. The Periodic Connect feature consumes battery. This is especially the case if the connection interval is set to be short so it occurs often.

Table 1