joeriv
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Costco 12v Jump Starter

Tue Jun 14, 2016 8:39 am

Just bought this Li Ion unit for $60 from Costco, measures 5.35 x 3 x 1 inches, weighs 0.65 pounds. I have a more expensive unit (jump started ICE cars no problem) and bought this for my Lexus. IMHO this is an essential for a LEAF - you never have to worry about a flat 12v battery. I'll bet that in an emergency you could run the Leaf on this alone.
2017 Leaf S with QC, JUN mfg date

GlennD
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Re: Costco 12v Jump Starter

Tue Jun 14, 2016 10:20 am

Assuming it is daytime and you do not need headlights then exclusive of the navigation module all you need is enough voltage to pull in the contactor. When it closes there will be a very large current from the inverter. In my jump statr pack it worked to pull in the contactor. Then a thermal breaker opened killing the pack until it cooled down. By then it did not matter since the 12V inverter was running.
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joeriv
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Re: Costco 12v Jump Starter

Tue Jun 14, 2016 11:38 am

I'm not an electronics whiz so bear with me - it sounds like there is a surge after starting? Is that what tripped your jump starter?
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GlennD
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Re: Costco 12v Jump Starter

Tue Jun 14, 2016 4:48 pm

When the inverter is running it puts out over 100A. That was enough to overwhelm the starter pack battery. Since the Leaf 12V battery was quite low the majority of the current flow was to the start pack. When it dropped out the inverter charged the Leaf 12V battery. At that point the car was running. I drove it to the dealer and I requested a new battery.

My "B"''s Tesla charger does a much better job of charging the 12V battery so I no longer carry the jump start pack. To maintain the gel cell battery in the jump start I charge it every couple of months. Letting a lead acid battery run down kills it. That is why a new car that is dead and needs to be jumped needs a new battery.

I once purchased a display Acura Legend. It had to be jumped and when I got home the battery died. I WAS NOT HAPPY but they came to the house and replaced the battery. Buying a high end car escalates the service level. On the other hand a simple rear end collision with minimal damage on my "B" was 4K. Good thing I was not paying.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e

joeriv
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Re: Costco 12v Jump Starter

Thu Jun 16, 2016 1:07 am

This is analogous to what happens when you jump start an ICE with an alternator?
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LeftieBiker
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Re: Costco 12v Jump Starter

Thu Jun 16, 2016 1:51 am

Letting a lead acid battery run down kills it. That is why a new car that is dead and needs to be jumped needs a new battery.


That is often true, but not always. When it was about a year old, my 2013 Leaf suffered one day from a 12 volt battery level so low that while it would dimly light the instrument panel, it wouldn't unlock the doors first. I charged it immediately, started using a battery maintainer, and almost two years later the 12 volt battery still tests ok. You can run one of these batteries down to 5-10% or so briefly and you lose capacity, but it isn't necessarily unsaveable or unusable.
Last edited by LeftieBiker on Thu Sep 13, 2018 12:33 am, edited 1 time in total.
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RegGuheert
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Re: Costco 12v Jump Starter

Thu Jun 16, 2016 6:50 am

Here's a link to the product at Costco ($59.99 + $5.99 shipping and handling):
Lithium Jump Starter and Portable Power Bank

And here it is at Amazon ($79.98):
High Output Jump Starter 2 USB Ports for Fast Charging of Mobile Devices 8000mAh High Capacity Power Bank 3 Mode Flashlight

That looks like a decent product at a good price. Thanks for the tip!
RegGuheert
2011 Leaf SL Demo vehicle
10K mi. on 041413; 20K mi. (55.7Ah) on 080714; 30K mi. (52.0Ah) on 123015; 40K mi. (49.8Ah) on 020817; 50K mi. (47.2Ah) on 120717; 60K mi. (43.66Ah) on 091918.
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Bob
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Re: Costco 12v Jump Starter

Thu Jun 16, 2016 7:12 am

Lithium batteries are often specified as having ~2% loss per month, so after one year of sitting in the trunk, it is conceivable that this device might be down to 76% of rated capacity. So it might be wise to recharge it every six months or so.

Bob

Iegarm
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Re: Costco 12v Jump Starter

Fri Nov 23, 2018 2:15 am

I realize this is an old thread, but I keep running across these old discussions and finding I have suggestions or better info to offer


I dont like them, potential fire hazard and they basically will jump maybe 5 cars and you are done in most cases. If the battery is totally stone dead it may not even jumpstart it. They are more handy to charge your phone or something imho.

Ive worked in the towing and repair industry a LONG time, everyone and I mean everyone uses jump n carry. Id say about 90% use the standard JNC660 and the others might use the next model up. In a given day I will jumpstart 10-15 vehicles on the road and not need to charge the pack (although you can charge it off a running vehicle). My own personal JNC660 https://10carbest.com/best-jump-starters I left sit for over a year and then finally it was to weak to start a V8 and charging it off my truck for 5 mins it fired up the V8.

We are talking thousands of jumps on some of the ones at work, zero failures. BUT its a different concept. It can power stuff, can jumpstart everything short of a fully stone dead diesel (6.6 duramax is no issues, forget a 7.3, 6.0 or cummins however unless you have a pack on each battery).

For most its overkill and too large, Ill happily use it however.
Last edited by Iegarm on Thu Nov 29, 2018 12:34 am, edited 1 time in total.

LeftieBiker
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Re: Costco 12v Jump Starter

Fri Nov 23, 2018 3:33 am

That's the problem - SLA units with enough capacity are too big and heavy for most of us to want to carry one. Remember that we don't usually have to jump even ONE car, as it's there for emergency use. I do worry about fire, but I keep mine a bit less than fully charged, out of extreme heat and the sun, and charge it twice a year.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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