Hi guys , i have a gs450h 2008 , and my life battery it s just about 50 % left ( that s what the dr.prius app say ) , also i can drive on battery only about 1 km , so i was just thinking to change /fix my battery but as far as i know they are very expensive so i found some gs 450 at dismantle yard s but they are there for over 6 months and i am not sure if those battery are still ok or not and also if there is any chance to check them without to be plug in on the car , if anyone know a way or have some advice will be very appreciate , thank you