Have Toyota Questions? Ask a Mechanic for Answers ASAP
How do you know the battery is good? Did you have it tested out of the car? When you install the jumper cables did you check the connections to the battery? Do you have a voltmeter to check a few voltages in the junction blocks?
At any time was the vehicle jumped backwards even for a split second? Do you have a voltmeter to check the voltage at the battery or the terminals?
You are welcome IT is not unusual to see new batteries fail let me know how it goes.