roadtripper
Well-Known Member
- First Name
- Brian
- Joined
- Apr 13, 2020
- Threads
- 9
- Messages
- 75
- Reaction score
- 47
- Location
- New Mexico
- Car(s)
- 2020 Supra
AGM batteries are built better than standard lead acid batteries. They should take discharges better as well. That said, Discharging to the point it will not start or so low car functions do not work does permanently take some capacity from the battery. Shortly after a long drive I checked my battery voltage and it was 12.6vdc. I expected higher because of the long drive. I started the car and the voltage went to 12.8vdc. Again, I assumed it should be much higher like 13.4-13.8. Our batteries are in the car not under the hood like most cars. I wonder if the under charge the battery to reduce off gassing? Shouldn't be much of a problem anyway since its a sealed battery.
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