Well I may have jinxed myself. Tried starting the Prius this morning and I just got the dash lights flickering and relays trying to flip. Turned the headlights off (I sometimes leave them on, since they automatically turn off when you lock the car) and it started right up. Got the 12v battery voltage showing on the UG and it shows right around 12v after sitting for a while, dropping to about 11.5v when stuff starts running. I think it was around 25F in the morning, and it'll only be getting colder.
Now I'm debating whether I should get that LiFePO4 battery or stick with lead acid...
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