[Omnisphere]

My 2022 Sienna (XLE, AWD) battery died again yesterday after I had the doors open while I was working on my van build. No dome lights were on...all lights were off...and it died for the second time. I have an extended trip coming up and I wanted to make sure that my emergency charger would work, so I tried it out, and had no luck. I have a BASAF charger which has a starting current of 600A and peak current at 1200A. It's worked before on the FJ. Since the cables were too short, my thought was that I could clamp the short cables onto longer cables and that the current would still travel to the battery. (Charge points on the Sienna seem to be in the fuse box and a metal loop on the other side of the engine.). So...no luck there. I ended up getting a charge from the FJ.

Does anyone have an emergency battery charger with longer cables that works for them? I'm leaving on Saturday and am headed to Alaska. I'm trying to avoid having a dead battery in the middle of the Yukon with no one around, LOL.

 

[Sienna9816]

I don't have a direct suggestion.

FWIW, I have had 12V battery die on me multiple times doing similar things as you. First time it happened, I turned off everything, locked the car and sat there waiting for a jump from Toyota service truck. For the sake of it, I tried starting after about 5 minutes and it worked! Looks like sitting on it a for a few mins lets12V battery gather up enough juice to get going again. (Sort of like upside-down emptish ketchup bottle). It has worked all other times too. You should definitely have a jumper, but try starting it after about few mins just for the heck of it.

Thinking out loud:

I haven't tried, but may be keep the power back door off on your trip? If the battery dies, may be you can open up back door and attach the jumper directly to 12v battery?

Also, I thought we could connect negative to any metal place on the body/frame? Does it not work for Sienna?

 

[Omnisphere]

I don't have a direct suggestion.

FWIW, I have had 12V battery die on me multiple times doing similar things as you. First time it happened, I turned off everything, locked the car and sat there waiting for a jump from Toyota service truck. For the sake of it, I tried starting after 5 about minutes and it worked! Looks like sitting on it a for a few mins lets12V battery gather up enough juice to get going again. (Sort of like upside-down emptish ketchup bottle). It has worked all other times too. You should definitely have a jumper, but try starting it after about few mins just for the heck of it.

Thinking out loud:

I haven't tried, but may be keep the power back door off on your trip? If the battery dies, may be you can open up back door and attach the jumper directly to 12v the battery?

Also, I thought we could connect negative to any metal place on the body? Does it not work for Sienna?

Thanks for your reply. I went with a Dewalt power station jump starter as it has longer cables and also functions as an air compressor. It's considerably larger than the BASAF charger that I had, but it has a pretty good rating and the longer cables will definitely reach. My understanding is that you can connect the negative on any bare metal but there don't seem to be too many options near the fuse box.

 

[Goolong]

I have a bluetti eb3a($179 recent sale on ebay) 280wh and a jackery 12v ($30) car to jumper that i use to trickle charge if needed. It may take about 5 to 10 minutes depending how far below the voltage the battery is. I also use the eb3a to power my aftermarket drm . The drm pulls 9w , so the drm / dash cams can go about 24 hours. I have the eb3a connected to the inverter to charge when im driving. (Quick charge in an hour).

Also the eb3a is lipo4 inatead of lithium so much more temperature stable to leave in the car.

 

[wscan]

You could try turning the kick sensors off. The kick sensors have been known to cause draining of the battery in the 2022. This is usually associated with dirt or ice in the sensor area, but they may stay active if the door is open. It would be worth a try. For what it is worth, I have left the sliding doors open on my 2021 for very long periods, sometimes overnight without any battery problems. The only issue is that the doors shut themselves off after about 80 minutes and must be manually closed.