This morning, still no green light, but the car started and I drove it to work. A Toyota mechanic friend of mine suggested I move the tender jr. The battery tender jr is a trickle charger, so it can take it a while to bring a battery up to full charge. I put the battery tender jr on the jump point when I left yesterday, and it started when I came home, but the fully charged light was still red, not green, so I appreciate what you said. But after driving home, it would not start the next morning. The second guy had a much bigger jump box, and the car started right up. That only did enough to light up the blinking red car icon on the center console with the key inside it. The first guy who came by had a small power box. The night we came back it took a lot of juice to get it started however. But I suspect it had enough reserve to keep the computer settings. But it was dead enough that there were no lights working at all, car remote would not unlock the car, no green light on push button start, etc. Apparently the battery was only mostly dead (a la Miracle Max), because I appear not to have lost some computer settings, like the radio stations, MPG, etc. is not a viable option, what do you all recommend, keeping in mind I probably cannot construct anything myself, so I am looking at store bought solutions.Ģ) Can I keep the voltage on by using the jump point in the engine bay from a 12v source?ģ) Is 51R the correct size (someone may have given me the wrong size when I asked the dealership), and are there recommendations for which one to use? I know it has to be deep cycle.Ĭlick to expand.Ok, let me back up. to maintain this charge, or is the trickle charge too weak?ġa) if the battery tender jr. I have a couple of questions in this regard:ġ) Can I use my battery tender jr. I know you are supposed to keep a charge on the vehicle by keeping voltage going when the battery is disconnected. I am trying to trickle charge it, but if that fails, I have some questions about replacing the battery.

I have been told the correct replacement is the 51R. So my wife left the dome light on all weekend in freezing temps (at the airport) and of course the 12v battery died.

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