[Elecraft] K2 with KPA-100

[Gene O]

For a portable operation:

Can anyone tell me if I have a K2 with the KPA-100 and the KAT2 low 
power auto tuner installed can it be operated at say 35 watts.  I will 
have a battery large enough to supply power. (Will not use this setup at 
100W).  Will the tuner work OK?

I've been hunting thru the archives trying to find an answer but it has 
eluded me.

Thank you.

Gene, W2BXR