The TB6000 is a battery tester and charger. I purchased it three years ago when I replaced my batteries. At that time, both batteries had a health status and state of charge in the high 90 percent range.
I drove from Tucson to Seattle and back with a current shunt on my jeep. Never saw more than 50A charging current. After starting the current is 50A max then very quickly goes to 15A to 20A.
Battery Voltage Gauge - The BCM acquires the battery voltage directly from the battery by way of the Intelligent Battery Sensor (IBS). The BCM then sends this value in a signal on the CAN-C network to the IPC for the IPC display
This is from the service manual, but I just unplugged the IBS and...