RLXXI
Well-known member
That's the beauty of those batteries. They have just as much power to work with at 90% as they do at 20%.
Pretty flat discharge curve. I see your point now.
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12V battery replacement
- Thread starter FloridaBreen
- Start date
- Watchers 15
Lytning
Well-known member
Attached are screen copies of 12 volt data from the Ohmmu app and Car Scanner at the same time in my Lightning. Both show 100% 12 volt SOC. Ohmmu shows 14.39 volts, and Car Scanner shows 14.2 volts at the battery and 14.4 volts at the OBD port. Interestingly, both show 0 amps 12 volt battery current. Car Scanner shows 49 amps DC-DC Low Voltage. The truck was "On" with the AC running when the data screens were captured. It appears that the main battery DC-DC Low Voltage powers all 12 volt users when the truck is running, and the 12 volt battery is inactive.
Maxx
Well-known member
It looks like Truck provides the same voltage to my battery (OEM) and Yours. I get 14.35V when truck is running and 12.4V when it is off at 100% LVB SOC. It is the first time I see mine at 100%. I drove for 140 miles yesterday and charged for eight hours last night. That should do it. What I don’t know understand is that this morning around noon, when I tried to leave fan started going crazy trying to cool something. My AC was not running. Granted truck was sitting in the sun for a few hours but when I checked the battery temp, it was at 73F with ambient temp at 82.Attached are screen copies of 12 volt data from the Ohmmu app and Car Scanner at the same time in my Lightning. Both show 100% 12 volt SOC. Ohmmu shows 14.39 volts, and Car Scanner shows 14.2 volts at the battery and 14.4 volts at the OBD port. Interestingly, both show 0 amps 12 volt battery current. Car Scanner shows 49 amps DC-DC Low Voltage. The truck was "On" with the AC running when the data screens were captured. It appears that the main battery DC-DC Low Voltage powers all 12 volt users when the truck is running, and the 12 volt battery is inactive.
Note; by the time I plugged in to ODB II, the fan had already stopped cooling. It was running 1-2 minutes. I doubt battery temp can drop from really hot to 73 that quickly. Does anyone know what was fan cooling?
htobin
Well-known member
This evening when I turned off my truck, I got the following message. Not sure what it means. I have been parked for about an hour with the car running and I’m not sure if that had anything to do with it my truck is a 2023 lariat with about 25,000 miles. Is that any indication that I might need a 12 V battery exchange? I did turn it off and on and got the same message. Everything else seems fine
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Maquis
Well-known member
Are you sure you had the truck “running?” It looks like it was in accessory mode. That’s why it’s telling you either turn it on or turn it off.This evening when I turned off my truck, I got the following message. Not sure what it means. I have been parked for about an hour with the car running and I’m not sure if that had anything to do with it my truck is a 2023 lariat with about 25,000 miles. Is that any indication that I might need a 12 V battery exchange? I did turn it off and on and got the same message. Everything else seems fine
htobin
Well-known member
It occurred when I shut down the truck. I restarted it and shut it down again and got the same message
jeff_h
Well-known member
This is the internet so there's never a consensus on anything... but when I replace mine I'm going to get this one:
https://shop.advanceautoparts.com/p...-ca-60-min-reserve-capacity-h3-xev/50001096-P
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