Compressor powered by jump pack

[Darreng]

As title says does any 1 use a jump pack for there 12v power when away from home i have 1 and thought it might be better than using the car battery as with all the electronics a car has no days

 

[ninja9]

I may be wrong but 12v off a car you would have the engine running running off a jump pack it would quickly drain it , mayby 1 or 2 fills not sure.

 

[Gilly]

That's totally dependant on the available capacity & output wattage of the pack in comparison to how much your compressor pulls. I'd also have reservations on the potential damage it may do to the battery (depending on the batteries size/specs) by putting it on high draw, long duration loads. As @ninja9 said, your engine should be running when you operate from the 12V car battery to limit the stress it's under.

 

[Andy from Sandy]

Having looked at just one tuxing compressor the specs are a little vague. There is a couple of figures for power and one that suggests typical current draw at 12 volts.

One figure is 350 Watts. That would (rounded up) give a current draw of 30 Amps.

A car starter battery maybe around 100 Amp Hours capacity but they should never really be discharged by more than 20% for their good health and longevity. To take 20 Amps out of the car battery with a 30 Amp load will be less than 1 hours use before it would need to be recharged.

A jump pack is typically about 10 Amp hours so will last at best around 20 minutes before being completely flat.

 

[crissdee]

I have run my Wulf compressor off my car battery without running the engine a few times with no ill effects, but I have a big battery on my car (4 litre V6 SUV). What it might do to the battery on a small hatchback/city car I am not electrician enough (at all) to say...

 

[Darreng]

It’s was just a idea really as I have 1 in the cupboard

 

[Andy from Sandy]

For the size and weight and depending on how long it takes to pump up your air rifle lithium would be a great solution.

A typical example of hobby grade LiPo which I expect is something like you will find in your jump starter.

10000mAh 11.1V 3S 25C Supersport XL LiPo Battery - Overlander Batteries

Discover the Overlander 10000mAh 11.1V 3S 25C Supersport XL LiPo Battery—high-capacity, durable, and perfect for large-scale RC models.

overlander.co.uk

 

[Darreng]

Thanks for the replies
I just rang a local motor factor I can by a brand new battery for £46 I might just buy 1 of those and use that and charge it when I get home with the battery charger in the shed

 

[Sid60]

Been running mine off a battery bought from Halfords a year ago and still going strong just keep the spare in the boot

 

[Darreng]

Been running mine off a battery bought from Halfords a year ago and still going strong just keep the spare in the boot

thats what im thinking

 

[crissdee]

For the size and weight and depending on how long it takes to pump up your air rifle lithium would be a great solution.

A typical example of hobby grade LiPo which I expect is something like you will find in your jump starter.

10000mAh 11.1V 3S 25C Supersport XL LiPo Battery - Overlander Batteries

Discover the Overlander 10000mAh 11.1V 3S 25C Supersport XL LiPo Battery—high-capacity, durable, and perfect for large-scale RC models.

overlander.co.uk

Serious question. I have a couple of Meccano motors, for which I usually have to scrabble around for batteries, or use a PP9 battery. The motors are labelled;

How long would a pack like that run one of those motors for? And how about running multiple motors?

 

[Andy from Sandy]

A PP9 apparently ha a capacity of 5Ah. The max current draw of that motor is 1.1 Amp so worst case is close to 5 hours.

Running with less load drawing less current will the batery last longer.

 

[crissdee]

I meant the LiPo.....

 

[Andy from Sandy]

You would have to run it on a 3 cell LiFePO4 pack but then it all depends on which cells you pick.

The thing is the motor draw is 1Amp so it's easy to work out how long a battery will last as I showed earlier.