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Get one of these: https://a.co/d/085CCPu1 Is a cigarette lighter socket USB charger with a volt meter on it. It doesn’t have to be super accurate, just cheap and reliable. Keep an eye on it. When the truck is on and drivable, it should be 14+ volts. This is the charging voltage of the battery. When you turn the truck off, it should be in the 12.5+ volts range. The truck is not charging the battery and you’re seeing the resting voltage of the battery. This will slowly come down from the charging voltage to the resting voltage so you may need to wait a few minutes to see it settle out. The truck will turn this off after about 10 minutes. If your battery is on its way out, this is when you’ll see it. You can also check this by turning the truck on without pressing the brake. This is a good thing to do in the morning after it has sat over night. A resting voltage close to 12 or less indicates a toasted battery. Happens after about three years of service. Just did mine and got the replacement from Rock Auto. Much cheaper than the dealership and still OEM. Swapping it out is very doable. If you do replace it yourself, search for the 12 volt battery charging reset process. This is how you tell the truck it has a new 12 v battery and to reset its charging history / pattern.