IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Question about battery

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Old Nov 29, 2018 | 07:01 AM
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Default Question about battery

How long can the car sit without being started before having a dead battery? Just got my IS350 last week and worried about the battery. Came from a 535i and after a week the battery would be dead, so I started using batter tenders. This isn't my daily driver so it sits in a garage for a bit.

Also from factory, are these AGM batteries? If I change it out, does i need to be registered like BMWs? Stupid IBS.

I hooked up a quick connector for a batt tender this weekend that I used from my 5, can this hurt the battery being an AGM tender?

Thanks


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Old Nov 29, 2018 | 08:10 AM
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I went 2 weeks back in Sept without having the car started while I was on vacation. My battery is about 2 1/2 yrs old too. I live in AZ, and the heat during the summer can really kill batteries. Came back from my vacation, and the car started right up without any worries.
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Old Nov 29, 2018 | 08:29 AM
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I also did two weeks while in Hong Kong. car started right back up easily. We do have tiny batteries compared to BMWs though, so don't push it.

I think Toyota uses various suppliers for its batteries. Either exide or johnson controls. shouldn't matter. they're all pretty much industry standard stuff.
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Old Nov 29, 2018 | 08:37 AM
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Thanks for the reply. That's awesome, with the BMW, I always had to make sure it went to sleep and found it awkward that it makes engine noises while it was off.
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Old Nov 29, 2018 | 09:14 AM
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18 days i left it without disconnecting the battery and the dashcam when i travelled this july. Came back and started right up (phew), bought it in Dec 2016 and was still on original battery.
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Old Nov 29, 2018 | 09:23 AM
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I went 6 weeks from Aug until Oct without starting my 2011 GS350, with an original battery. It took a while for the computer system to boot up, but then engine turned right over with no problem.I didn't disconnect the battery or anything.
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