We have a 2018 jeep Cherokee limited. A few days ago we were sitting idle at a friends house chatting and I got a warning message that said something like battery saver mode. I am not 100% but it was something like that. We left and went home, I checked the voltage while we were driving and it was 13.7. Next day everything was fine and no issues. The day after, vehicle would not start but dash lights worked. When my husband got home and tried to start it there was no power at all. He charged the battery and tried to start the vehicle but again, just dash board lights and not enough power to start the engine. Battery was 2 years old. He took the battery back to O’reilly and had them test it. They said it needed to be charged but at that time, he had charged it overnight on the trickle charger. They replaced the battery. He got home and put the battery in and at first it did not start. I don’t know if it needed a few minutes or what. He was getting ready to call the mechanic because at that point he figured it was the starter maybe. I ran back out to get something out of the jeep and decided to try one more time and it started up just fine. He took it back to town and had O’reilly check the alternator and it was fine as well. When I got in it this afternoon it started fine but the voltage was only 13.7 after starting. I figured with a new battery it would be higher. Am I wrong? I don’t want to get stuck somewhere if it decides not to start again. I live in Texas so the past few weeks has been very hot and I am wondering if that takes a toll on the voltage as well. Thank you for any information!
Cedarcreekfarmstand
Hi and welcome
I think I can make this easy for you. The Cherokee alternator is temperature compensated, which means you will see higher charging voltage in cold weather, lower in warmer. The actual range on our Jeeps is 13.6V (or 13.7, not 100% sure) to 14.4V.
So... you're in Texas and it's Hot right now : 13.7V is perfect charging voltage. If your battery connectors are nice and tight, you're good to go.
Why 2 years battery life ? Hot climates are battery killers. Stop-and-go driving is a battery killer. Letting the Jeep sit for long periods of time kills batteries. Some accessories like live wired dash cams are battery killers, too. We see folks in Arizona go through batteries every 2 years because of the climate, in this Jeep.
HTH.
Hahahaha... Good thing Volts, Amps and Watts are 'unit neutral'If you moved to Quebec, I believe you would have to do the metric equivalent of volt, or m^2·kg·s^-3·A^-1. And it would have to be in French! I looked for those conversions on my Evic but I couldn't find it.
Oh, wait. There is no imperial version of "volt". And "volt" in English is "volt" in French! I guess my gauge is displaying French metric data and I didn't even know it! I dunno. That metric stuff still throws me.
Some other interesting differences : Newton.meter (Nm) instead of foot.lbs (or inch.lbs). Joules vs BTUs. Most Canadians older than 50 are still familiar with inches, pounds, feet, mph, etc... but the younger generations are more metric now. I was 12 y/o when we switched to metric, so I'm fluent in both systems.
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