Husqvarna Blastrac BMG 2200RC Operator's Manual page 31

You can read from the display the parameters as follow:
Press the "+" button to set the screen to on.
Press the "+"and "-" buttons again to scroll through display to see the state of charge.
Battery Voltage (V)
Amperage (A) that is flowing out of the battery (negative sign)
or into the battery (no sign)
Estimated time (h) of how long the battery can support the present load until it needs
recharging
The power (W) drawn from the battery (negative sign) or flowing into the battery
(no sign).
The amount of Ah consumed from the battery
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