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The original VVB battery lasted 11.5 years and died... I've had the car for 5.5 years and I haven't done anything with the battery. The previous owner said he hadn't messed with it either. The entire battery needed to be replaced. The P0A7F error kept popping up. Battery diagnostics showed that the entire battery needed to be replaced. It turned out that there are some cool guys from Evfrat Avto in Krasnoyarsk who took lithium (Li-ion) battery cells from a Honda Fit in a GP5 body and installed them in the Prius 30 battery case. I decided to do this modification and didn't regret it, because the battery works well, there are no problems, even in freezing temperatures. Link to the Evfrat Avto channel / @evfratavto8548 I recommend them and am grateful that they helped me solve the problem with the battery. Enjoy watching, the video turned out to be long, but probably valuable :)