I've been dealing with this WAV for a couple weeks now. Battery and Wrench indicators only blink. No error codes, no low voltage errors in history. I'm getting 25.4 V across batteries, and on handset, after full charge. I've swapped ED-B contactor assembly, nothing. The unit will try to drive after hands and feet (driving lights flash as intended), but unit only moves extremely slow before it shuts down on its own. Please help.