Power Saving Recommendations; Use Of Power Banks And External Battery Packs - Vox -01 Operating Manual

• It is normal for the total battery capacity to slowly decrease over time. After
500 charge/recharge cycles, the battery capacity is normally at 80% to 90%
of its original capacity, depending on the way the device is used and recharged.
• We recommend that you do not charge while measuring. The instruments'
measuring electronics are highly sensitive; the digital charging circuitry
may have an impact on the noise floor of the pre-amplifier and microphone,
while noise and hum from the AC charger may also be inserted. Although
the electronics have been protected against such sources of interference, we
still recommend against recharging while doing actual measurements.

Power saving recommendations

How long the device can be used on a single charge depends on the mode and intensity of
use. Power conservation settings can be controlled from the device's "hardware settings"
menu. With its default settings, approximately 350 STIPA measurements can be carried
out over the course of an 8 hour day without recharging.
Some ways to extend the battery life:
• Switch off the device when you do not plan to use it for a while.
• Choose conservative power settings in the hardware menu. The LCD back-
light is a considerable factor in the overall drain on the battery.
• Disable "pre-amp phantom power" if you use a microphone that does not
need it.

Use of power banks and external battery packs

For very long measurement sessions, the battery capacity of the internal battery may be
insufficient. If you cannot spare a few hours of recharge time in the middle of your session,
we recommend that you use an external USB battery pack (aka power bank). You can also
power the VOX-01 from an AC power source through its own charger (or any USB power
source), but it is not recommended to power the device this way while measuring. The device
will be more susceptible to electronic noise and ground loop effects. Even though the device
has been certified to comply with the applicable EMC standards, also when connected to an
AC source, the signal quality is always slightly better when powered from batteries.
When you connect the VOX-01 to an external battery pack, a dialog will appear asking you
whether you want to charge the device. We recommend that you do not recharge the intermal
battery from the power bank, so choose "no." This way, all power will be supplied by the
external power bank. The internal battery will not be charged, nor discharged, while meas-
uring. Note that the battery pack should have an output current rating of at least 1500 mA.
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