Well add mine to the long list of HDS z1 machines that have failed. I replaced the battery on the circuit board with a exact replacement from Digikey but after reading this thread it seems the there are other settings critical to the operation of the device that are lost. Still get a 33 Fault after ...

My experience with a Z1 auto is that it will not make it through the night at 12 volts. It will eventually stop within a few hours. I have had success running it with a 16 volt power brick while camping. It has worked well on many trips and I don't need to carry the 120v power adapter. The power sou...