Power Supply; Battery Status Check - TENTECH MD1035x Manual De Uso

3. Power supply

This equipment is powered by an internal rechargeable LFP battery
(LiFePO4 12 V - 3000 mAh).

3.1. Battery status check

During the measurement, it is possible to check the battery status. The
 key must be pressed. If the battery charge is enough, it will read
"BAT OK". If the charge is not enough, the message will be "LOW BAT",
and the battery should be recharged. The analog bargraph will give an
approximate idea of the remaining charge percentage (at least 20% is
required for a normal operation).
When the battery charge reaches the normal operation minimum value,
the message LO BAT appears automatically in the area where the test
tension value is indicates, alternating it every 1 second.
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