Amazon Lightning Deal (NOCO Genius Boost Pro GB150 4000 Amp 12V UltraSafe Lithium Jump Starter)

[DPA200]

Saw this on the 200 forum tonight and at least 4 of us snatched up the deal. Thought I’d pass along if anybody wants a beast of a jump starter. Just over 2hrs left on the deal $239.94. Sells for about $300 pretty much everywhere else,

https://www.amazon.com/NOCO-GB150-U...0+4000+amp&dpPl=1&dpID=511izvsk8jL&ref=plSrch

 

[GWcruiser]

Gotta love advertising.

Those jump wires and clips had better be made of silver... even then I'd highly doubt you'll ever get a usable 4000 amps from the thing.

ps: I bought something like this DBPower a while back. Does a fair job, and less money.

https://www.amazon.com/gp/product/B077HY7SFJ

 

[DPA200]

Gotta love advertising.

Those jump wires and clips had better be made of silver... even then I'd highly doubt you'll ever get a usable 4000 amps from the thing.

ps: I bought something like this DBPower a while back. Does a fair job, and less money.

https://www.amazon.com/gp/product/B077HY7SFJ

I'm pretty sure there is actually some gold plating with diamond inlay indeed . There better be. Anyways, there was about 4 or 5 guys on the 200 forum that bought this deal other night. Its one of those models that never goes on sale anywhere usually. I've had quite a few cheap ones over the years that hadnt lasted or worked when i needed, so i bit the bullet and bought for $300 last week. Luckily Amazon let me return and re-buy during the sale so that saved me $60.

 

[GWcruiser]

I was just astounded anyone would advertise 4000 amps. Then on top of that say there are electronics between the battery and clamps that protects everything. 0.003 ohms at 12.6v is 4000 amps: three milliohms. Two feet of #2 copper takes care of that. Since the batteries being used have somewhere around 6 to 17 mOhm internal resistance ...

The 'truth' the ad does tell is the 22,500 joules over three seconds. That equates to about 600 amps, a bit more amps if you include the battery series resistance and 9.6v test voltage. Though this J3S is not an industry standard specification as far as I know.

FYI, one engineering test of several 100Ah lead acid batteries (Gel, AGM, and flooded) showed a range of dead short currents between 2250 and 5500 amps. And that was a well designed crowbar test, see page 7-4.
-- https://www.sbsbattery.com/PDFs/VRLAshortCurrentsStorageBatterySystems.pdf

I'm a retired test engineering type, so I tend to go overboard on these sorts of electrical measurement things.

 

[DPA200]

I was just astounded anyone would advertise 4000 amps. Then on top of that say there are electronics between the battery and clamps that protects everything. 0.003 ohms at 12.6v is 4000 amps: three milliohms. Two feet of #2 copper takes care of that. Since the batteries being used have somewhere around 6 to 17 mOhm internal resistance ...

The 'truth' the ad does tell is the 22,500 joules over three seconds. That equates to about 600 amps, a bit more amps if you include the battery series resistance and 9.6v test voltage. Though this J3S is not an industry standard specification as far as I know.

FYI, one engineering test of several 100Ah lead acid batteries (Gel, AGM, and flooded) showed a range of dead short currents between 2250 and 5500 amps. And that was a well designed crowbar test, see page 7-4.
-- https://www.sbsbattery.com/PDFs/VRLAshortCurrentsStorageBatterySystems.pdf

I'm a retired test engineering type, so I tend to go overboard on these sorts of electrical measurement things.

Thanks for the input. It sounds more like a foreign language to me , but very good to know if i do have electrical questions in the future i know who in the club to ask for sure!