Portable Jump Starter

[Omega Woods]

Bought a Yesper based on Project Farm recommendation. About three weeks after purchase, I was headed to pick up a trailer and stopped for the night at a hotel. In the morning, the truck batteries were dead and the truck wouldn't even click. Called roadside assistance then Mrs. Woods remembered the battery pack. I didn't have much hope that it would start my Ram 2500 6.7 Cummins from cold and dead. Hooked it up, said a prayer and she fired right up. Called roadside back and reported that I got her going. Stopped for fuel and had to jump it again. After jumping the truck off five times, it still indicated 50-75% charge.

It may be Chinese crap and it may die an early death but I'm glad I took a chance on it.

Amazon.com

Same one @Snobdds posted earlier.

 

[woody]

I've bought two different NOCO brands based on their reviews on Amazon. First one worked great for about a year to jump my zero turn and my tractor. Then one day, it wouldn't hold a charge anymore and it was useless.

I liked it so much when it worked that I bought another, slightly bigger one with a ton of great reviews. This one only lasted a few months before it stopped holding a charge.

I gave up and bought new batteries for the zero turn and tractor, and then bought a trickle charger for the zero turn. I've never had a lawn mower battery last more then two years, but I just finished year three with the trickle charger on the mower and I bet it will be good for another year!!!

I wish we lived closer I been wanting to do an experiment with a bad Noco and of course it involves taking one apart.

 

[sea2summit]

I wish we lived closer I been wanting to do an experiment with a bad Noco and of course it involves taking one apart.

I could see a capacitor of that size being pretty entertaining

 

[Snobdds]

How do you figure? I don’t think anything near 100A gets to the battery from the alternator, that would be a huge fire hazard and battery life destroyer. I’m certain there is a inline LED, just like any common battery tender/charger, to prevent back feeding.

ETA everything I’m seeing in the googlebox says maximum recommended amperage for lead acid 12V is 10 amps for longevity. Looks like some alternators can push 50-60 amps to charge the batteries but it also sounds like there is a regulator/controller.

Ok lets assume your 10 amps figure is correct. Do yo think putting 10 amps into a boost pack in place a battery is smart.

It almost seem like your advocating for that.

 

[sea2summit]

Ok lets assume your 10 amps figure is correct. Do yo think putting 10 amps into a boost pack in place a battery is smart.

It almost seem like your advocating for that.

Reread my post, I’m sure it’s protected. But you put out 100A which is what started the question. I’m genuinely curious about your thoughts but it seems like your just making up imaginary problems at this point.

 

[Snobdds]

Reread my post, I’m sure it’s protected. But you put out 100A which is what started the question. I’m genuinely curious about your thoughts but it seems like your just making up imaginary problems at this point.

Well modern day alternators put out 100amps, I know that's not imaginary. I have no idea what wizard circuitry each individual car has to regulate that, but common sense says there is some significant amps being put back into the battery via the battery cables. More than a USB port can put into the jump pack, no?

You key'd into the 100amp figure and it all went to fact check mode for you instead of seeing the larger point.

 

[sea2summit]

I have no idea what wizard circuitry each individual car

Could have saved us all a lot of time if you would have started with that.

 

[LouNY]

How do you figure? I don’t think anything near 100A gets to the battery from the alternator, that would be a huge fire hazard and battery life destroyer. I’m certain there is a inline LED, just like any common battery tender/charger, to prevent back feeding.

ETA everything I’m seeing in the googlebox says maximum recommended amperage for lead acid 12V is 10 amps for longevity. Looks like some alternators can push 50-60 amps to charge the batteries but it also sounds like there is a regulator/controller.

You might be surprised if you put a clamp on amp meter on the alternator wire to the battery, or just feel how hot that wire gets.
If you jumpstart a vehicle with an almost dead battery and then bring the rpm up around 3000 rpm you can hear those batteries and smell the gases.
There are many vehicles and tractors with 150 amp alternators and larger.

 

[JohnP3616]

I was thinking of putting a 20V Dewalt jumper on my Christmas list, since I already have the batteries, but I’m rethinking that. I’m not sure I want to expose them to our summer Texas heat in a vehicle. And Dewalt may not be the best option anyway. I’m thinking maybe a NOCO 1200 amp is a better option.

 

[Duds13]

Amazon had some great deals on Hulkman stuff for Black Friday. I have their sigma 5 trickle charger but ordered their Sigma 1 since it was 68% off. I also have the Alpha 85 jumpstarter and that is on sale still.