[Elecraft] K2– loss of sensitivity

[Hans Elfelt Bonnesen]

K2 # 7359 w/ built-in battery.
If I turn on my K2 in the battery state the sensitivity is unexpectedly low. ( with 12.1 volts ). One S-unit local noise.
As soon as I apply the normal charging voltage from the supply (with 13,7volts ) it 
suddenly jumps to normal sensitivity. Four S-units local noise.
Is this normal, or could something be done ?


73 de OZ5RB, Hans