Jump pack info plz

I jump many vehicles a year.
My wifes truck due to kids leaving lights on or movie playing all kinda thing.
Employees vehicles on occasion.
5 different pettibone tractors that have 4 cyl. Cummins. Especially in winter.
Would also be nice on longer days on the water as insurance policy (ummm fridge install?)
But how many mah? How many volts?
What brand?
I KNOW some of you keep them around but would love real world experience backing any numbers you may have.
Thanks in advance again!
Ps - i have read a bunch of junk online but was looking more for experience and suggested specs/preferences for my application but all info here for people searching is good
#jump
#jump pack
#batterypack

Only brand I will buy for this is NOCO. Better components and better contruction than the vast majority of the rest. Have a GB 40 for the boat that I tested on my 5.7l truck with the battery disconnected and it worked. GB 70 may be a better choice for your needs keeping in mind their recommendations on engine size are at the top end of each units capabilities.

As far as all of the stuff online it really comes down to the lithium cell capacity/quality, on board bms capacity/quality, and size/quality of the conductors.

Speedling said:

But how many mah? How many volts?
What brand?

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These are all 12v systems on the boats. You would never have a need for 6 or 24 as it would only be used in emergency situations to jump the engines for starting.

These are also PWC engines with very small draw unlike a car engine. The recommendation above is more than adequate. But this is a good reason for a proper dual battery setup keeping your accessories separate from the cranking battery. You should never drain your starting battery, and should always have some juice on at least one for emergency. This dual battery setup would cost no more than one of these jump boxes and better overall utility. (that's assuming you are not already setup for dual battery, in that case you have no need for a jump box)

I have a small lithium jump pack from Costco, love it for the size and it's worked well so far, used it 6-7 times, luckily never on the boat,

knowing Maniah's opinion though, it's an emergency item and when you need it, you need it to work,

biffdotorg said:

These are all 12v systems on the boats. You would never have a need for 6 or 24 as it would only be used in emergency situations to jump the engines for starting.

These are also PWC engines with very small draw unlike a car engine. The recommendation above is more than adequate. But this is a good reason for a proper dual battery setup keeping your accessories separate from the cranking battery. You should never drain your starting battery, and should always have some juice on at least one for emergency. This dual battery setup would cost no more than one of these jump boxes and better overall utility. (that's assuming you are not already setup for dual battery, in that case you have no need for a jump box)

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I do indeed have a dual battery setup with a starter battery and a house battery however for the other vehicles that I start on a occasional basis and more often are tractors with a small 4-cylinder diesel engine on them which I believe is 100 horsepower typically I need something to jump those

I second Noco. I have a GB20 in my wife and my daughters cars, and a GB150 in my truck (6.7L Cummings). They're pricey, but when you need it, they work.

My daughter leaves a light bar on her Jeep turned on quite regularly, and has used her GB20 at least 4 or 5 times without recharging it. And it continues to start without a problem. And she says it still shows 75%.

Scottintexas said:

I have a small lithium jump pack from Costco, love it for the size and it's worked well so far, used it 6-7 times, luckily never on the boat,

knowing Maniah's opinion though, it's an emergency item and when you need it, you need it to work,

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I have the Costco one too. Really nice (especially for the price) and jumped my old boat with a big old 4.3 Merc in it with no problems.

I've got an antigravity XP 10 that I bought, accidentally I might add. Funny story....my wife had one-click purchase setup on Amazon. Was looking at jump packs online one day. A couple days later it showed up at the house in the mail. Wife said what the hell is this? I said it looks like a jump pack. Apparently I must have clicked the purchase button. Wouldn't you know it, she disabled one-click purchase. Anyway, back to the antigravity. Was a bit pricey but is top of the line. When my son was in high school he'd take it to all day wrestling tournaments. I think the whole team would charge their phones on it all day and it would barely drop 10%. Jumps cars, trucks including large diesels. Have only used once on the boat and it worked like a charm. Awesome product and I highly recommend. Always with me when when we are on the boat.