Really..?
That is the NOCO GB70 on Amazon with a 4.2 out of 5 with 2700+ reviews.
FWIW my family has 8 of them (all different sizes) in every vehicle we own and we have never had a problem with any of them.!
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What's the best 12V jump starter to keep handy?
- Thread starter PhilDavid
- Start date
Really..?
That is the NOCO GB70 on Amazon with a 4.2 out of 5 with 2700+ reviews.
FWIW my family has 8 of them (all different sizes) in every vehicle we own and we have never had a problem with any of them.!
quickstrike12
Member
Brand was KMASHI. It only overheated/fried when I tried to charge it after a few months. Never used it until then. Just kept it charged. Not surprisingly, it’s no longer available on Amazon. Only normal power banks to charge phones, etc. are.Do you mind telling us which brand let you down?
This is what concerns me as well as I found a few on Amazon that seem perfect on paper but they all have about 15% of 1 star verified purchase reviews from those who claim it let them down...
Worse yet, others complain of a fire risk. Last thing I want is the emergency battery starting a fire in the frunk!
Just keep in mind that if your your Model S goes dead due to 12 volt battery failure the last place you're going to want your jump starter is in the car because you may not be able to get in the car until you connect power to the jumper terminals.
this isn't old school where you just stick the key in the door and reach inside and get it or open the trunk etc.
this isn't old school where you just stick the key in the door and reach inside and get it or open the trunk etc.
We know.
This is why I mentioned earlier on that we plan to keep it in the frunk. The frunk has a mechanical cable pull to open it even if the car has no power. This unfortunately also makes it a poor place to store a laptop or other valuables because anyone can pop the frunk open by pulling a cable.
Hey
Thanks for bring this up. I get what you are trying to solve.
you can read all the reviews you want, as you can imagine, the more a product sells, some units will be defective, some manufacturers' products fail more than others' but some issues are inherent to the product. They are all Li cells, with circuitry and depending on QC of parent company, things can fail at various steps in mfg process. Some will die, some will have defective heat sensors causing to melt etc [ assuming they were installed] and multitude of others.
Personally my experience is good. I have 2 of these as below:
I do have the BoltPower one and it holds 4/5 charge every 6 months when I check it. I personally have to use it only 1x to help a random lady in a parking lot, and it worked flawlessly. [ if you must know, it was a 2.5L motor] I've used it to charge phones etc as well. I charge it [ actually both] every Th'giving for winter. And in spring it's always had 4/5 charge. Length of ownership: 4 yrs. Mine is a older version and it looks like they now include laptop adapters and a soft shell case [ mine came with a hard plastic case ]
I also have the "walmart version" of these [ impulse buy at a fire sale] and used to keep in my beater car. Same 4/5 charge in spring. had it for 3 yrs
In the end, you get one from brand you want And believe in. Do research. Hope it does not fail. Brands that have been around like BoltPower are preferable. Practice opening the trunk once or twice a year as you would in even of 12V failure.
docbrown
Member
Over the last couple of months, it happened twice where someone in an ICE needed a jumpstart and I couldn't help them. So I looked into a portable jumpstarter, with the added benefit that I could use it to charge other devices and also get the Tesla going if the 12v battery ever failed. I decided I wanted an Li based battery and not lead acid. I looked at Consumer Reports and ended up going with this one:
https://smile.amazon.com/gp/product...arch_detailpage?ie=UTF8&psc=1#customerReviews
I know it has over 10% one star reviews, but it seems they all do. I did test it as soon as I received it. It jump started our V6 SUV twice, and then recharged with no problem.
https://smile.amazon.com/gp/product...arch_detailpage?ie=UTF8&psc=1#customerReviews
I know it has over 10% one star reviews, but it seems they all do. I did test it as soon as I received it. It jump started our V6 SUV twice, and then recharged with no problem.
mspohr
Well-Known Member
People are 10x as likely to report bad experience as good. I wouldn't be dissuaded by the bad reviews
Good point. Seems all emergency battery packs have 10% 1-star reviews.
Wish Tesla made an emergency battery to keep in the car!
Xenoilphobe
Well-Known Member
Once the AGM Lead Acid 12 volt battery goes bad, just replace it with this and don't worry about it. https://www.element3batteries.com/product-page/tesla-lithium-12v-battery.
My daughters Ford Fusion Hybrid AGM Lead Acid would die every time the car sat for a month, once I switched over to this battery, we haven't had an issue since.
Lithium Battery Power | Lithium Batteries for Solar, RV, Marine, Carts
My daughters Ford Fusion Hybrid AGM Lead Acid would die every time the car sat for a month, once I switched over to this battery, we haven't had an issue since.
Lithium Battery Power | Lithium Batteries for Solar, RV, Marine, Carts
is this a special type of Lithium battery that can recover from deep discharge cycles and extreme temperature variances?
Thanks for the heads up. We went ahead with the Bolt Power D29 based on a couple of recommendations on this thread. Seems like it is a reasonable price point and I hope the quality will be good!
Is there any way to simulate a dead 12V battery with the Model S to make sure the emergency jump battery works when I receive it?
Xenoilphobe
Well-Known Member
Yes, it has a BMS system. All batteries are affected by temperature, but in a Tesla the DC to DC converter does help protect it and Tesla can refresh the charge profile from AGM to Lithium. I still have a portable jumper battery, but these are much more powerful than standard AGM.
Why lithium?
L.B.P Lithium Ion RV Batteries are equipped with a Limited Lifetime Warranty and are compatible with every type of RV from travel trailers to luxury motor coaches. The built-in Battery Protection System (BPS) installed in every L.B.P 12V Lithium RV Battery will prevent the battery from over voltage and under voltage. BPS also allows you to plug and play the batteries for any RV. BPS is also useful to maximize the capacity in every cycle due to their ability to balance and maintain the cells.
LBP advanced lithium technology has 2000 complete charge and discharge cycles at 80% DOD. You can still enjoy more than 80% of usable energy left even after 2000 cycles.
Example: After being discharged 100% for 2000 cycles, a 12v 100ah battery is now equal to a 12v 80ah battery.
Xenoilphobe
Well-Known Member
Cost and mostly likely supplier demand issues.
The OEM AGM battery costs about $140 + $400 in labor to install. Source:12V Battery Replacement Cost
The Lithium Battery costs $440, I had Tesla install it when I was still under warranty, I paid for the battery and Tesla provided the labor at no cost.
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