2k Pro Power ??
Logistics Pro
Joined: May 2022
Posts: 4,285
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From: Everywhere and nowhere
750CCA/78AH batteries and the diesel gets 750CCA/68AH AGMs. AGMs are ok to discharge to 50% if you charge them back to 100% right away but the lower you drain them for the longer a period of time the shorter their life gets. If you dont top them off after using them and let them sit they start to degrade.
That being said I've had a Duralast AGM on my OBS for 4 winters in Alaska and I've never tried to start the truck below -20 cause it's a waste of gas to just let my 460 idle for 20 minutes to warm everything around the engine. But the batteries have started the truck at -20 and after sitting in the cold for about 40 days. My dad just started it yesterday for the first time in 2 months. My '22 7.3 has leaky Motorcraft batteries at 16k miles and its only seen 31 degrees 1 night. Its never been above 94.
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