Hello: I am fairly new to the Prius world having bought this car used from Carmax in September 2012. Just took the car into the Toyota dealership yesterday for its 65,000 mile check and was advised by the dealer that the 12 v battery failed load test and that I should get a new battery (no problems experienced thus far but was told car may not start if battery is not replaced) at the coast of $407 ($288 for the battery and 119 for installation). I said no and immediately came home and started researching batteries. Attempted to view diagnostics on the multi-function display, which took awhile to figure out, and saw that the charge was at about 9v. My question in replacing this battery: Toyota uses a True Start battery and it is so expensive. Am I able to utilize a more generic battery and, if so, what would be recommended. I am going to have a mechanic replace it for me because I am not proficient in any mechanics of this car. I found a place called Hybrid Battery Repair in San Fernando Valley that ues a generic battery and charges 195 with installation. Any thoughts?