My house batteries have been handling this cold snap without blinking (knocks on wood), but my coach battery went from 100% charge to 60% overnight. 60%, I discovered, isn't enough to crank the engine. For the first time, I pulled out my trusty charger and used it to trickle charge (at 2A) the starting battery. This took less than 10 minutes. I'll do this once a day until the cold snap passes. I nice it was to have the tool to do this! My neighbours have been boosting their trucks to get them going each day and I know this is not good for a battery.
The car started fine this morning and I have the option of trickle charging it, too, should I have an issue with it at some point.
The charger has a 100A 'jump start' mode for boosting using the charger rather than another vehicle, but I can't use it for obvious reasons! In a pinch, I could use the 15A 'fast charge' mode, but trickle charging is definitely the better battery maintenance option.
There is so much to think about!
"Life's but a walking shadow, a poor player that struts and frets his hour upon the stage and then is heard no more. It is a tale told by an idiot, full of sound and fury, signifying nothing."